between a rock and a hard place不要理解为”处于岩石和坚硬的地方之间“，可以引申为陷入困境、左右为难，进退维谷，进退两难。

【例句】
You were really between a rock and a hard place when you had to choose between your career and your relationship.
当你不得不在事业和感情之间做出选择时，真的是进退两难。

I couldn't make up my mind. I was caught between a rock and a hard place.
我下不了决心，陷入了进退维谷的境地。