| 1. | To back up tiles is tedious work .
把文档备份是一项枯燥无味的工作。 |
| 2. | He has decided to back out of the scheme .
他决定退出这件计划。 |
| 3. | Do you have any facts to back up all this ?
你有可以证明这一切的任何事实吗？ |
| 4. | Stand back to back and let us see who 's taller .
背靠背站好，看看谁的个子高。 |
| 5. | Mr. dimmock had wanted to back out .
迪莫克先生想不干了。 |
| 6. | But it was too late then, of course, to back out .
但是现在要缩回来当然为时已晚。 |
| 7. | Once you 've given your word , do n't try to back out .
一旦许下诺言，就不要想翻悔。 |
| 8. | We drove into a dead end and had to back out .
我们把车子开进了一条死胡同，只得退出来。 |
| 9. | Clogged pipes caused drain water to back up into the room .
水管堵塞，排出去的水倒灌入室。 |
| 10. | You've got to back me up .
你必定得给我撑腰。 |
