老头跪在了地上。

The old man had sunk to his knees.

《牛津词典》

因为我怕摔倒头，所以就使劲往前趴，腿一下子跪在了地上，幸好带着护具，没有事。

Because I am afraid of falling head, so we energetically forward crouch, legs suddenly kneeling on the ground, but fortunately with protective gear, nothing is wrong.

youdao

他的勇气一下子遗弃了他，他跪在地上，为他过世的朋友，述说着祈祷。

His courage forsook him as he knelt and said a prayer for his departed friend.

youdao