hang in there 坚持下去；别泄气；忍耐一下

【例句】
Hang in there and you never know what you might achieve.
坚持下去，你永远都无法预料会有什么样的收获。

You better hang in there in order to get your college degree.
为要取得大学文凭，你最好还是坚持下去。