| 1. | She has had three pregnancies in four years . 她在四年中怀孕三次。 |
| 2. | He will hold his office during the term of four years . 他的任职以四年为任期。 |
| 3. | He had had four years in the field as a foot soldier . 他在战场上当过四年步兵。 |
| 4. | The following four years were a prosperous interlude . 随后四年,是繁荣的间歇期。 |
| 5. | He outlived his son by four years . 他比儿子多活了4年。 |
| 6. | The tenure of office of an american president is four years . 美国总统的任期是四年。 |
| 7. | In four years at college , he ranked first in the examination . 大学4年,他考试名列榜首。 |
| 8. | The gilligan record in four years as governor was exemplary . 吉利根当州长四年,政绩斐然。 |
| 9. | For four years he shouldered an almost unbearable burden . 一连四年他肩负着几乎是难以担负的重担。 |
| 10. | For the next four years he steamed up and down the mississippi . 此后四年中,他往返航行于密西西比河上。 |