stick at
phrasal verbstick at something
- to continue to work in a serious and determined way to achieve something
坚持不懈地做（某事）；持之以恒；锲而不舍 - If you want to play an instrument well, you've got to stick at it.
要想练好一种乐器，你必须持之以恒。
- If you want to play an instrument well, you've got to stick at it.