我们不必苦恼映射多对多的关系。

We didn't bother mapping this many-to-many relationship.

youdao

不必苦恼，不是你的想得也得不到。

Does not need to be worried, is not you wants to result in also cannot obtain.

youdao

三分天注定，七分靠打拼，万事不可强求，只要你尽力了，就不必自责，不必苦恼。

Three days to be doomed, seven points by hard work, everything can not be forced, as long as you do your best, you do not have to blame yourself, do not have to worry about.

youdao