docs(cn): translate reference/react/legacy into Chinese (#1251)

Author: Yucohny

src/content/reference/react/legacy.md

@@ -1,34 +1,34 @@
 ---
-title: "Legacy React APIs"
+title: "过时的 React API"
 ---
 
 <Intro>
 
-These APIs are exported from the `react` package, but they are not recommended for use in newly written code. See the linked individual API pages for the suggested alternatives.
+这些 API 从 `react` 包中导出，但是已经不再推荐在最新代码中使用。参见下方每个 API 对应的页面以查看替代方案。
 
 </Intro>
 
 ---
 
-## Legacy APIs {/*legacy-apis*/}
+## 过时的 API {/*legacy-apis*/}
 
-* [`Children`](/reference/react/Children) lets you manipulate and transform the JSX received as the `children` prop. [See alternatives.](/reference/react/Children#alternatives)
-* [`cloneElement`](/reference/react/cloneElement) lets you create a React element using another element as a starting point. [See alternatives.](/reference/react/cloneElement#alternatives)
-* [`Component`](/reference/react/Component) lets you define a React component as a JavaScript class. [See alternatives.](/reference/react/Component#alternatives)
-* [`createElement`](/reference/react/createElement) lets you create a React element. Typically, you'll use JSX instead.
-* [`createRef`](/reference/react/createRef) creates a ref object which can contain arbitrary value. [See alternatives.](/reference/react/createRef#alternatives)
-* [`isValidElement`](/reference/react/isValidElement) checks whether a value is a React element. Typically used with [`cloneElement`.](/reference/react/cloneElement)
-* [`PureComponent`](/reference/react/PureComponent) is similar to [`Component`,](/reference/react/Component) but it skip re-renders with same props. [See alternatives.](/reference/react/PureComponent#alternatives)
+* [`Children`](/reference/react/Children) 允许你处理和转化作为 `children` 的 JSX。[查看替代方案](/reference/react/Children#alternatives)。
+* [`cloneElement`](/reference/react/cloneElement) 允许你使用一个元素作为初始值创建一个新的 React 元素。[查看替代方案](/reference/react/cloneElement#alternatives)。
+* [`Component`](/reference/react/Component) 允许你定义一个 JavaScript class 作为 React 类式组件。[查看替代方案](/reference/react/Component#alternatives)。
+* [`createElement`](/reference/react/createElement) 允许你创建一个 React 元素，但是一般会使用 JSX。
+* [`createRef`](/reference/react/createRef) 允许你创建一个可以包含任何值的 ref 对象。[查看替代方案](/reference/react/createRef#alternatives)。
+* [`isValidElement`](/reference/react/isValidElement) 检测参数值是否为 React 元素，通常会与 [`cloneElement`.](/reference/react/cloneElement) 一起使用。
+* [`PureComponent`](/reference/react/PureComponent) 与 [`Component`](/reference/react/Component) 类似，但是当 props 相同时会跳过重新渲染。[查看替代方案](/reference/react/PureComponent#alternatives)。
 
 
 ---
 
-## Deprecated APIs {/*deprecated-apis*/}
+## 已弃用的 API {/*deprecated-apis*/}
 
 <Deprecated>
 
-These APIs will be removed in a future major version of React.
+这些 API 将在未来的 React 主要版本中被移除。
 
 </Deprecated>
 
-* [`createFactory`](/reference/react/createFactory) lets you create a function that produces React elements of a certain type.
+* [`createFactory`](/reference/react/createFactory) 可以创建一个能够生成指定类型 React 元素的函数。