patch: glossary.jade - new JIT clause.

public/docs/ts/latest/glossary.jade

@@ -615,12 +615,17 @@ a#H
   a#jit
   :marked
     ## Just in Time (JIT) Compilation
+
+    ## 即时编译（Just in Time (JIT) Compilation）
   .l-sub-section
     :marked
       With Angular _Just in Time_  bootstrapping you compile your components and modules in the browser
       and launch the application dynamically. This is a good choice during development.
       Consider the [Ahead of Time](#aot) mode for production apps.
 
+      Angular的即时编译在浏览器中启动并编译所有的组件和模块，并动态运行应用程序。它很适合开发期使用。在产品发布时，
+      推荐采用[提前编译（Ahead of Time）](#aot)模式。
+
 .l-main-section#K
 :marked
   ## kebab-case