单词：on his back
在他的后背
on his back的用法和样例：
例句
- The tramp carried his belongings in a pack on his back.那个流浪者把所有的东西捆成一包背在背上。
- He said in a low voice, both his hands (being) on his back.他低声地说，他的双手放在背后。
- The burden on his back seemed to be crushing him to the earth.他背上的重负似乎要把他压倒在地。
- The traveler took out a bottle of water from the pack on his back.那位旅行者从他的背包中拿出了一瓶水。
- I saw weals raise on his back.我看到鞭痕从他背上隆起。
- He lay on his back and looked up at the sky.他仰卧著观看天空。