diff --git a/Comparing commits across time 在交叉时间合并提交.md b/Comparing commits across time 在交叉时间合并提交.md
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+Comparing commits across time 在交叉时间合并提交
+===========
+ 
+参考：<https://help.github.com/articles/comparing-commits-across-time/#comparing-branches>
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diff --git a/Creating a pull request 创建 pull 请求.md b/Creating a pull request 创建 pull 请求.md
index a59c6f6..8e3d47b 100644
--- a/Creating a pull request 创建 pull 请求.md	
+++ b/Creating a pull request 创建 pull 请求.md	
@@ -1,6 +1,37 @@
 Creating a pull request 创建 pull 请求
 ===========
  
+创建一个 pull 请求是为了协作更改存储库。这些变化会产生一个分支,它确保主分支保持干净整洁。
+
+在你可以打开一个 pull 请求之前,您必须[创建一个分支](Creating and deleting branches within your repository 在你的库中创建和删除分支.md),然后添加提交到分支。Pull 请求只能在你的分支和上游分支之间有区别时打开。
+
+1.切换到你要改变的库
+
+2.在“Branch”菜单，选择包含你的提交的分支。
+
+![](https://help.github.com/assets/images/help/pull_requests/branch-dropdown.png)
+
+3.“Branch”菜单右侧，点击  Compare and Review
+
+![](https://help.github.com/assets/images/help/pull_requests/pull-request-start-review-button.png)
+
+4.对比页面，将会自动选择  [基本和对比分支](Comparing commits across time 在交叉时间合并提交)。要改变，点击 Edit
+
+![](https://help.github.com/assets/images/help/pull_requests/edit-compare-branches.png)
+
+5.在对比页面，点击  Create pull request
+
+![](https://help.github.com/assets/images/help/pull_requests/pull-request-click-to-create.png)
+
+6.在你的 pull 请求中，输入 标题和描述
+
+![](https://help.github.com/assets/images/help/pull_requests/pullrequest-description.png)
+
+7.点击 Create pull request
+
+![](https://help.github.com/assets/images/help/pull_requests/pullrequest-send.png)
+
+当你 pull 请求已被审查，可以[合并到库](Merging a pull request 合并一个 pull 请求.md)。
 
 
 *参考*：[https://help.github.com/articles/creating-a-pull-request/](https://help.github.com/articles/creating-a-pull-request/)
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diff --git a/Creating and deleting branches within your repository 在你的库中创建和删除分支.md b/Creating and deleting branches within your repository 在你的库中创建和删除分支.md
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+++ b/Creating and deleting branches within your repository 在你的库中创建和删除分支.md	
@@ -0,0 +1,4 @@
+Creating and deleting branches within your repository 在你的库中创建和删除分支
+===========
+ 
+参考：[https://help.github.com/articles/creating-and-deleting-branches-within-your-repository/#creating-a-branch](https://help.github.com/articles/creating-and-deleting-branches-within-your-repository/#creating-a-branch)
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diff --git a/Merging a pull request 合并一个 pull 请求.md b/Merging a pull request 合并一个 pull 请求.md
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index 0000000..ff3157a
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+++ b/Merging a pull request 合并一个 pull 请求.md	
@@ -0,0 +1,4 @@
+Merging a pull request 合并一个 pull 请求
+===========
+ 
+参考：<https://help.github.com/articles/merging-a-pull-request/>
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