back: [OE] Back goes back to a prehistoric West and North Germanic *bakam, which was represented in several pre-medieval and medieval Germanic languages: Old High German bah, for example, and Old Norse bak. In most of them, however, it has been ousted by relatives of English ridge, originally ‘spine’ (such as German rücken and Swedish rygg), and only English retains back.=> bacon
例句
1. If you love life, life will love you back. 热爱生活,生活也会厚爱你。
2. We'll go to a meeting in Birmingham and come straight back. 我们将去伯明翰参加会议,然后马上回来。
3. The rescuers were beaten back by strong winds and currents. 救援人员因风浪太大而被迫中断工作。
4. I'll report back the moment I have located him. 我一找到他就马上汇报。
5. He ordered them to stack up pillows behind his back. 他命令他们把几个枕头叠放在自己的背后。