增加非官方翻译版本链接，中文

Author: jiachao2130

README.md

@@ -3,5 +3,10 @@
 This repo contains the CLAiR, the [Command Line Applications in Rust][clair] book.
 It is written and updated by the [Rust CLI working group][wg].
 
+## Multi-language support
+Unofficial translation:
+- 中文(zh_CN)：[Rust 中的命令行应用][rust-cli-zh_CN] (2021-09-13)
+
 [clair]: https://rust-cli.github.io/book/
 [wg]: https://github.com/rust-cli/meta
+[rust-cli-zh_CN]: https://suibianxiedianer.github.io/rust-cli-book-zh_CN/