add lifetime/inro.md

src/SUMMARY.md

@@ -48,10 +48,10 @@
   - [println! and format!](formatted-output/println.md)
   - [Debug and Display](formatted-output/debug-display.md)
   - [formating](formatted-output/formatting.md)
-- [Lifetime TODO](lifetime/intro.md)
+- [Lifetime](lifetime/intro.md)
   - [basic](lifetime/basic.md)
-  - [&'static and T: 'static](lifetime/static.md)
-  - [advance](lifetime/advance.md)
+  - [&'static and T: 'static TODO](lifetime/static.md)
+  - [advance TODO](lifetime/advance.md)
 - [Functional programing TODO](functional-programing/intro.md)
   - [Closure](functional-programing/cloure.md)
   - [Iterator](functional-programing/iterator.md)

src/lifetime/intro.md

@@ -1 +1,5 @@
 # Lifetime
+Learning resources: 
+- English: [Rust Book 10.3](https://doc.rust-lang.org/book/ch07-00-managing-growing-projects-with-packages-crates-and-modules.html)
+- 简体中文: [Rust语言圣经 - 包和模块](https://course.rs/advance/lifetime/intro.html)
+