I feel very happy if I help other people.

如果我帮助其他人，我感到非常高兴。

youdao

I really feel very happy, but do not understand why some people do.

我真的觉得自己很开心，但是不明白为什么有些人会这样做。

youdao

I really feel very happy, but do not understand why some people do.

我真的觉得自己很开心，但是不明白为什么有些人会这样做。

youdao