Save your strength留著点儿劲儿
Save your strength for the hard work you'll have to do later.

留着点儿劲儿，你一会儿还得干重活儿呢。
Save your strength for hard work you will have later.

养精蓄锐以应付今后你得去做的繁重工作。

sew up 缝合
Next day, Miss Stone decided to sew up the rip.

第二天，斯通小姐决定将撕破的地方缝好。
He says he need to sew up the wounds.

他说，他得把伤口缝合。