Collapse: update English doc

examples/docs/en-US/collapse.md

@@ -13,43 +13,34 @@
     }
   }
 </script>
-<style>
-  .demo-collapse {
-    .el-collapse-item__header {
-      .header-icon {
-        margin-left: 5px;
-      }
-    }
-  }
-</style>
 
 ## Collapse
 
-Use Collapse to storage content.
+Use Collapse to store contents.
 
 ### Basic usage
 
-可同时展开多个面板，面板之间不影响
+You can expand multiple panels
 
 :::demo
 ```html
 <el-collapse v-model="activeNames" @change="handleChange">
   <el-collapse-item title="Consistency" name="1">
-    <div>与现实生活一致：与现实生活的流程、逻辑保持一致，遵循用户习惯的语言和概念；</div>
-    <div>在界面中一致：所有的元素和结构需保持一致，比如：设计样式、图标和文本、元素的位置等。</div>
+    <div>Consistent with real life: in line with the process and logic of real life, and comply with languages and habits that the users are used to;</div>
+    <div>Consistent within interface: all elements should be consistent, such as: design style, icons and texts, position of elements, etc.</div>
   </el-collapse-item>
   <el-collapse-item title="Feedback" name="2">
-    <div>控制反馈：通过界面样式和交互动效让用户可以清晰的感知自己的操作；</div>
-    <div>页面反馈：操作后，通过页面元素的变化清晰地展现当前状态。</div>
+    <div>Operation feedback: enable the users to clearly perceive their operations by style updates and interactive effects;</div>
+    <div>Visual feedback: reflect current state by updating or rearranging elements of the page.</div>
   </el-collapse-item>
   <el-collapse-item title="Efficiency" name="3">
-    <div>简化流程：设计简洁直观的操作流程；</div>
-    <div>清晰明确：语言表达清晰且表意明确，让用户快速理解进而作出决策；</div>
-    <div>帮助用户识别：界面简单直白，让用户快速识别而非回忆，减少用户记忆负担。</div>
+    <div>Simplify the process: keep operating process simple and intuitive;</div>
+    <div>Definite and clear: enunciate your intentions clearly so that the users can quickly understand and make decisions;</div>
+    <div>Easy to identify: the interface should be straightforward, which helps the users to identify and frees them from memorizing and recalling.</div>
   </el-collapse-item>
   <el-collapse-item title="Controllability" name="4">
-    <div>用户决策：根据场景可给予用户操作建议或安全提示，但不能代替用户进行决策；</div>
-    <div>结果可控：用户可以自由的进行操作，包括撤销、回退和终止当前操作等。</div>
+    <div>Decision making: giving advices about operations is acceptable, but do not make decisions for the users;</div>
+    <div>Controlled consequences: users should be granted the freedom to operate, including canceling, aborting or terminating current operation.</div>
   </el-collapse-item>
 </el-collapse>
 <script>
@@ -66,27 +57,27 @@ Use Collapse to storage content.
 
 ### Accordion
 
-At the same time only one item can be opened.
+In accordion mode, only one panel can be expanded at once
 
-:::demo 通过 `accordion` 属性来设置是否以手风琴模式显示。
+:::demo Activate accordion mode using the `accordion` attribute.
 ```html
 <el-collapse v-model="activeName" accordion>
   <el-collapse-item title="Consistency" name="1">
-    <div>与现实生活一致：与现实生活的流程、逻辑保持一致，遵循用户习惯的语言和概念；</div>
-    <div>在界面中一致：所有的元素和结构需保持一致，比如：设计样式、图标和文本、元素的位置等。</div>
+    <div>Consistent with real life: in line with the process and logic of real life, and comply with languages and habits that the users are used to;</div>
+    <div>Consistent within interface: all elements should be consistent, such as: design style, icons and texts, position of elements, etc.</div>
   </el-collapse-item>
   <el-collapse-item title="Feedback" name="2">
-    <div>控制反馈：通过界面样式和交互动效让用户可以清晰的感知自己的操作；</div>
-    <div>页面反馈：操作后，通过页面元素的变化清晰地展现当前状态。</div>
+    <div>Operation feedback: enable the users to clearly perceive their operations by style updates and interactive effects;</div>
+    <div>Visual feedback: reflect current state by updating or rearranging elements of the page.</div>
   </el-collapse-item>
   <el-collapse-item title="Efficiency" name="3">
-    <div>简化流程：设计简洁直观的操作流程；</div>
-    <div>清晰明确：语言表达清晰且表意明确，让用户快速理解进而作出决策；</div>
-    <div>帮助用户识别：界面简单直白，让用户快速识别而非回忆，减少用户记忆负担。</div>
+    <div>Simplify the process: keep operating process simple and intuitive;</div>
+    <div>Definite and clear: enunciate your intentions clearly so that the users can quickly understand and make decisions;</div>
+    <div>Easy to identify: the interface should be straightforward, which helps the users to identify and frees them from memorizing and recalling.</div>
   </el-collapse-item>
   <el-collapse-item title="Controllability" name="4">
-    <div>用户决策：根据场景可给予用户操作建议或安全提示，但不能代替用户进行决策；</div>
-    <div>结果可控：用户可以自由的进行操作，包括撤销、回退和终止当前操作等。</div>
+    <div>Decision making: giving advices about operations is acceptable, but do not make decisions for the users;</div>
+    <div>Controlled consequences: users should be granted the freedom to operate, including canceling, aborting or terminating current operation.</div>
   </el-collapse-item>
 </el-collapse>
 <script>
@@ -101,50 +92,50 @@ At the same time only one item can be opened.
 ```
 :::
 
-### Customize Title
+### Custom title
 
-除了可以通过 `title` 属性以外，还可以通过作用域插槽来实现自定义面板的标题内容，以实现增加图标等效果。
+Besides using the `title` attribute, you can customize panel title with scoped slots, which makes adding custom content, e.g. icons, possible.
 
 :::demo
 ```html
 <el-collapse accordion>
-  <el-collapse-item title="Consistency">
+  <el-collapse-item title="Consistency" name="1">
     <template slot="title" scope="props">
       {{props.title}}<i class="header-icon el-icon-information"></i>
     </template>
-    <div>与现实生活一致：与现实生活的流程、逻辑保持一致，遵循用户习惯的语言和概念；</div>
-    <div>在界面中一致：所有的元素和结构需保持一致，比如：设计样式、图标和文本、元素的位置等。</div>
+    <div>Consistent with real life: in line with the process and logic of real life, and comply with languages and habits that the users are used to;</div>
+    <div>Consistent within interface: all elements should be consistent, such as: design style, icons and texts, position of elements, etc.</div>
   </el-collapse-item>
-  <el-collapse-item title="Feedback">
-    <div>控制反馈：通过界面样式和交互动效让用户可以清晰的感知自己的操作；</div>
-    <div>页面反馈：操作后，通过页面元素的变化清晰地展现当前状态。</div>
+  <el-collapse-item title="Feedback" name="2">
+    <div>Operation feedback: enable the users to clearly perceive their operations by style updates and interactive effects;</div>
+    <div>Visual feedback: reflect current state by updating or rearranging elements of the page.</div>
   </el-collapse-item>
-  <el-collapse-item title="Efficiency">
-    <div>简化流程：设计简洁直观的操作流程；</div>
-    <div>清晰明确：语言表达清晰且表意明确，让用户快速理解进而作出决策；</div>
-    <div>帮助用户识别：界面简单直白，让用户快速识别而非回忆，减少用户记忆负担。</div>
+  <el-collapse-item title="Efficiency" name="3">
+    <div>Simplify the process: keep operating process simple and intuitive;</div>
+    <div>Definite and clear: enunciate your intentions clearly so that the users can quickly understand and make decisions;</div>
+    <div>Easy to identify: the interface should be straightforward, which helps the users to identify and frees them from memorizing and recalling.</div>
   </el-collapse-item>
-  <el-collapse-item title="Controllability">
-    <div>用户决策：根据场景可给予用户操作建议或安全提示，但不能代替用户进行决策；</div>
-    <div>结果可控：用户可以自由的进行操作，包括撤销、回退和终止当前操作等。</div>
+  <el-collapse-item title="Controllability" name="4">
+    <div>Decision making: giving advices about operations is acceptable, but do not make decisions for the users;</div>
+    <div>Controlled consequences: users should be granted the freedom to operate, including canceling, aborting or terminating current operation.</div>
   </el-collapse-item>
 </el-collapse>
 ```
 :::
 
 ### Collapse Attributes
-| 参数      | 说明          | 类型      | 可选值                           | 默认值  |
+| Attribute      | Description          | Type      | Accepted Values       | Default  |
 |---------- |-------------- |---------- |--------------------------------  |-------- |
-| accordion | 是否手风琴模式 | boolean | — | false |
-| value | 当前激活的面板(如果是手风琴模式，绑定值类型需要为`string`，否则为`array`) | string/array | — | — |
+| accordion | whether to activate accordion mode | boolean | — | false |
+| value | currently active panel | string (accordion mode)/array (non-accordion mode) | — | — |
 
 ### Collapse Events
-| 事件名称 | 说明 | 回调参数 |
+| Event Name | Description | Parameters |
 |---------|---------|---------|
-| change | 当前激活面板改变时触发(如果是手风琴模式，参数 `activeNames` 类型为`string`，否则为`array`) | (activeNames: array\|string) |
+| change | triggers when active panels change | activeNames: array (non-accordion mode)/string (accordion mode) |
 
 ### Collapse Item Attributes
-| 参数      | 说明          | 类型      | 可选值                           | 默认值  |
+| Attribute      | Description          | Type      | Accepted Values       | Default  |
 |---------- |-------------- |---------- |--------------------------------  |-------- |
-| name | 唯一标志符 | string/number | — | — |
-| title | 面板标题 | string | — | — |
+| name | unique identification of the panel | string/number | — | — |
+| title | title of the panel | string | — | — |