轻轻跨坐上对方的背，二、背部：让对方俯卧床上。

Gently on each other's sit back, and secondly, back: let each other prone bed.

youdao

轻轻跨坐上对方的背，二、背部：让对方俯卧床上。

Gently on each other's sit back, and secondly, back: let each other prone bed.

youdao