As hard as it is to watch your brother make a mistake, this isn't your business and he will resent and reject whatever you suggest.

作为很难观察你的弟兄犯了一个错误，这不是你的生意，他会不满而拒绝任何你的建议。

youdao

I need to buy a new watch for your brother.

我需要为你的兄弟买一块新手表。

youdao

That sounds great! Can your brother watch it with us?

好主意！你弟弟可以跟我们一起看吗？

youdao