knee-bend

例句：

1. 1.She knelt down to pick up the fallen flower.
   她跪下来捡起了落花。
2. 2. The old man knelt down to pray for forgiveness.
   老人跪着祈祷宽恕。
3. 3.He knelt down on the ground and began to weep.
   他跪在地上开始哭泣。