| 1. | They sang songs to keep their morale up .
他们唱歌以保持士气高昂。 |
| 2. | I work out regularly to keep fit .
我经常努力锻炼身体以保持健康。 |
| 3. | Our foil packets seal the flavor in .
我们用锡纸包装以保持原味。 |
| 4. | She laid her dress on the bed to keep it neat .
她把连衣裙放在床上以保持平整。 |
| 5. | The sidewalk was hosed every day to keep it clean .
人行道每天都用水管冲刷以保持清洁。 |
| 6. | Moses made a special effort to keep a neutral look .
摩西作了一次特别的努力，以保持一种漠然的表情。 |
| 7. | These materials require constant agitation to keep them in suspension .
这些药剂要经常搅动以保持悬浮状态。 |
| 8. | He kept himself fit with a rigid daily exercise schedule .
他每天都按照严格的时间表进行锻炼以保持身体健康。 |
| 9. | Occasionally he put up a hand to satisfy himself hair remained undisturbed .
他偶尔用一只手摸摸头发以保持一丝不乱。 |
| 10. | Some of the women-teachers are usually proud of their position of being a diana .
有些女教师常常以保持独身主义地位而自豪。 |
