on their knees

• adj. 跪着(在严重的状态中)

on their knees的用法和样例：

例句

用作形容词 (adj.)

1. She was on her knees scrubbing the kitchen floor.
   她趴在厨房里跪着刷洗地板呢。
2. Joe went down on his knees and prayed.
   乔跪着祈祷。