Fixed translation errors in CONTRIBUTING.md

CONTRIBUTING.md

@@ -4,32 +4,32 @@
 
 C++ 11/14/17 issue is used to track the principle description error, `typo` error, and the questions to the author of the book.
 
-- Usually, you may encounter typos, semantic errors, grammatical errors, and etc. These are all `typo` errors. If an error has caused some obstacles to your reading and you strongly believe that the `typo` will also affect others reading. Then you are very welcome to [submit issue](https://github.com/changkun/modern-cpp-tutorial/issues) to report the `typo` error.
+- Usually, you may encounter typos, semantic errors, grammatical errors, and etc. These are all `typo` errors. If an error has caused some obstacles to your reading and you strongly believe that the `typo` will also affect others reading, then you are very welcome to [submit issue](https://github.com/changkun/modern-cpp-tutorial/issues) to report the `typo` error.
 
-- Do not hasitate to submit a principle error because it prevent wrong knowledge being propagation.
-Report the error immediately by [submitting issue](https://github.com/changkun/modern-cpp-tutorial/issues) to avoid the spread of wrong knowledge.
+- Do not hesitate to submit a `principle` error because it will prevent wrong knowledge being spread.
+Report the error immediately by [submitting issue](https://github.com/changkun/modern-cpp-tutorial/issues) to avoid the propogation of wrong knowledge.
 
-- If you found some part of the book is confusing, you are very welcome to [submit an issue](https://github.com/changkun/modern-cpp-tutorial/issues) for asking questions.
+- If you found some part of the book confusing, you are very welcome to [submit an issue](https://github.com/changkun/modern-cpp-tutorial/issues) for asking questions.
 
-- The book cannot cover the entire C++ of course, however, you are very welcome to [submit an issue](https://github.com/changkun/modern-cpp-tutorial/issues) for a suggestion if you found some important feature is missing in the book.
+- The book cannot cover the entirety C++ of course, however, you are very welcome to [submit an issue](https://github.com/changkun/modern-cpp-tutorial/issues) with a suggestion if you find some important feature is missing in the book.
 
 ## Pull Request
 
-"C++ 11/14/17 On the Fly" is open source so that everyone can contribute to contribute to PR. However, it is required read the following instructions carefully before submitting your pull request:
+"C++ 11/14/17 On the Fly" is open source so that everyone can contribute to contribute via a PR. However, it is required to read the following instructions carefully before submitting your pull request:
 
 - Before you submit your pull request, make sure that the [issue list](https://github.com/changkun/modern-cpp-tutorial/issues) already contains the problem you want to solve. If not, please refer to the **Submit Issue** section.
 
-- Make sure your PR has improved the `typo` error of more than 50 words, otherwise please do not submit a PR.
+- Make sure your PR has improved more than 50 `typo` errors, otherwise please do not submit a PR.
 
-- For a PR that fixes principled errors, please don't hesitate, all readers of the book are very grateful for your contribution!
+- For a PR that fixes principled errors, please don't hesitate, all of the readers of the book are very grateful for your contribution!
 
 - If you would like to be a co-author of this book, please send an email to ask: `hi at changkun dot us`.
 
 Since this repository provides a variety of reading approaches, thus make sure you have checked all items in the following checklist:
 
 - [ ] If you only making changes to the main part of the book (i.e. the `book` folder), and no changes to the code snippet, then you are good to go;
-- [ ] If you also change the code snippet in the main body of the book, then you need to synchronize the corresponding code snippet in the `code` folder;
-- [ ] If you changes also involve the exercises, you also need to synchronize the contents of the `exercises` folder.
+- [ ] If you also changed the code snippet in the main body of the book, then you need to synchronize the corresponding code snippet in the `code` folder;
+- [ ] If your changes also involve the exercises, you also need to synchronize the contents of the `exercises` folder.
 
 # 如何参与贡献