init translation of _Creating Types from Types

docs/documentation/zh/handbook-v2/Type Manipulation/_Creating Types from Types.md

@@ -1,22 +1,20 @@
 ---
-title: Creating Types from Types
+title: 用现有类型创建新类型
 layout: docs
 permalink: /zh/docs/handbook/2/types-from-types.html
-oneline: "An overview of the ways in which you can create more types from existing types."
+oneline: "概述如何从现有的类型创建更多的类型。"
 ---
 
-TypeScript's type system is very powerful because it allows expressing types _in terms of other types_.
+TypeScript 的类型系统非常强大，因为它允许用_其他类型_表达类型。
 
-The simplest form of this idea is generics. Additionally, we have a wide variety of _type operators_ available to use.
-It's also possible to express types in terms of _values_ that we already have.
+这个想法最简单的形式就是泛型。此外，我们还有多种_类型操作符_可以使用。我们也可以用我们已有的_值_表达类型。
 
-By combining various type operators, we can express complex operations and values in a succinct, maintainable way.
-In this section we'll cover ways to express a new type in terms of an existing type or value.
+通过组合不同的类型操作符，我们可以用简洁、可维护的方式表达复杂的操作和值。在本部分中，我们将介绍如何用现有的类型或值表达新的类型。
 
-- [Generics](/docs/handbook/2/generics.html) - Types which take parameters
-- [Keyof Type Operator](/docs/handbook/2/keyof-types.html) - Using the `keyof` operator to create new types
-- [Typeof Type Operator](/docs/handbook/2/typeof-types.html) - Using the `typeof` operator to create new types
-- [Indexed Access Types](/docs/handbook/2/indexed-access-types.html) - Using `Type['a']` syntax to access a subset of a type
-- [Conditional Types](/docs/handbook/2/conditional-types.html) - Types which act like if statements in the type system
-- [Mapped Types](/docs/handbook/2/mapped-types.html) - Creating types by mapping each property in an existing type
-- [Template Literal Types](/docs/handbook/2/template-literal-types.html) - Mapped types which change properties via template literal strings
+- [泛型](/zh/docs/handbook/2/generics.html)——带有参数的类型
+- [Keyof 类型操作符](/zh/docs/handbook/2/keyof-types.html)——使用 `keyof` 操作符创建新的类型
+- [Typeof 类型操作符](/zh/docs/handbook/2/typeof-types.html)——使用 `typeof` 操作符创建新的类型
+- [索引访问类型](/zh/docs/handbook/2/indexed-access-types.html)——使用 `Type['a']` 语法访问类型的子集
+- [条件类型](/zh/docs/handbook/2/conditional-types.html)——类型系统中类似于 if 语句的类型
+- [映射类型](/zh/docs/handbook/2/mapped-types.html)——通过映射现有类型的每个属性创建类型
+- [模板字面量类型](/zh/docs/handbook/2/template-literal-types.html)——通过模板字面量字符串改变属性的映射类型