lie in
1．be in the power of 在…能力以内
I have done everything that lies in my power．我已尽了最大努力。
2．centre in；exist in；be found in 集中于；在于；存在于
All their hopes lie in him．他们把一切希望都寄托在他身上。
The chief difficulty lies in finding a good opportunity．主要困难在于找到一个好时机。
The trouble lies in the engine．毛病出在发动机上。
His chief attraction lies in his character，not his looks．他的魅力在于他的性格，而不是外貌。
The fundamental way out for agriculture lies in mechanization．农业的根本出路在于机械化。
3．stay in bed to await the birth of a child 分娩
She is lying in．她正在分娩。
The time has come for her to lie in．她生产的时候已经到了。
4．stay in bed after the normal time for getting up 睡懒觉
You ought to lie in tomorrow and catch up on your sleep．你明天应当晚起，把你所缺的觉补上。
She never lies in，even on Sunday mornings．她从不睡懒觉，即使星期天早上也如此。