Update platform-difference.md
diff --git a/docs/guide/platform-difference.md b/docs/guide/platform-difference.md
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@@ -58,6 +58,6 @@
+ [《navigator control》](../docs/modules/navigator.html)
+ [《storage》](../docs/modules/storage.html)
-In order to maintain the versatility of the framework, Weex's built-in native modules are limited, but Weex provides the ability to extend native modules. For specific extension methods, please refer to [《iOS extend》](./extend/extend-ios.html) 和[《Android extend》](./extend/extend-android.html)。
+In order to maintain the versatility of the framework, Weex's built-in native modules are limited, but Weex provides the ability to extend native modules. For specific extension methods, please refer to [《iOS extend》](./extend/extend-ios.html) and[《Android extend》](./extend/extend-android.html)。
> Some interfaces also exist in the browser environment, but you should pay attention to browser compatibility when using them; for example, the clipboard function, for security reasons, most browsers restrict their use.
