Merge pull request #281 from yue2388253/master

a little revision

src/ch16-01-threads.md

@@ -1,6 +1,6 @@
 ## 使用线程同时运行代码
 
-> [ch16-01-threads.md](https://github.com/rust-lang/book/blob/master/src/ch16-00-concurrency.md)
+> [ch16-01-threads.md](https://github.com/rust-lang/book/blob/master/src/ch16-01-threads.md)
 > <br>
 > commit 1fedfc4b96c2017f64ecfcf41a0a07e2e815f24f
 

src/ch17-01-what-is-oo.md

@@ -8,7 +8,7 @@
 
 ### 对象包含数据和行为
 
-Erich Gamma、Richard Helm、Ralph Johnson和 John Vlissides（Addison-Wesley Professional, 1994）的 *Design Patterns: Elements of Reusable Object-Oriented Software* 被俗称为 `The Gang of Four book`，是面向对象编程模式的目录。它这样定义面向对象编程：
+由 Erich Gamma、Richard Helm、Ralph Johnson 和 John Vlissides（Addison-Wesley Professional, 1994）编写的书 *Design Patterns: Elements of Reusable Object-Oriented Software* 被俗称为 `The Gang of Four`，它是面向对象编程模式的目录。它这样定义面向对象编程：
 
 > Object-oriented programs are made up of objects. An *object* packages both
 > data and the procedures that operate on that data. The procedures are