spread yourself too thin idiom
同时做太多事情（以致没有足够时间或精力关注任何一个）
to try to do too many things at the same time, so that you cannot give enough time or attention to any of them
I realized I'd been spreading myself too thin so I resigned as secretary of the golf club. 我意识到我做的事情太多，因此我辞去了高尔夫球俱乐部的秘书一职。