NOTE: PR (pull request, a set of changes someone tries to push to a GitHub repository. Once a PR is sent, interested parties (peer engineers) can review the set of changes, discuss potential modifications, and even push follow-up commits if necessary.
另外，经常会遇到有些 review 的 comments 里出现不同意见，其实是两个人在编程习惯和约定俗成上没有共识。如果在不违背公司 style guideline 的情况下，没必要一定让对方和你有一样的习惯。如果你真的觉得这样更好，通常我也只会写 “I personally would prefer A over B, but no strong opinion.” 或者 “How about change it to A, since ... However, this is not a merge blocker. ”