| 1. | He has come through two world wars .
他身经两次世界大战，劫后余生。 |
| 2. | He was married twice, and raised a family .
他结过两次婚，养活一家人。 |
| 3. | The shop changed hands twice within a week .
该店一周内易手两次。 |
| 4. | She is already served two aces this game .
她在这一局中已两次发球得分。 |
| 5. | He gives twice that gives in a twice .
立刻施与的人等于施与两次。 |
| 6. | I received two slaps on the face myself .
我自己脸上挨了两次刮。 |
| 7. | Two mistakes are allowable in this game .
这种游戏允许犯规两次。 |
| 8. | He swung it once and twice and again .
他又迎面劈去，一次，两次，又一次。 |
| 9. | Once or twice she looked over her shoulder at me .
有一两次她回头看看我。 |
| 10. | To solve it we must carry out two integrations .
要解它必须进行两次积分。 |
