| 1. | A laboratory must be kept in good order .
实验室里必须保持井井有条。 |
| 2. | Mr. elton must compose his joyous looks .
厄尔吞先生必须保持他欢乐的神色。 |
| 3. | The town where she lived had to be kept clean and sweet .
她住的镇上必须保持清洁、芳香。 |
| 4. | Ventilation must be ensured .
必须保持通风。 |
| 5. | "you must compose yourself," said the doctor, supporting her .
“你必须保持镇静，”大夫扶着他说。 |
| 6. | We must keep the whole thing in low key no matter what happens .
无论发生什么事，我们在整个事件中必须保持低调。 |
| 7. | Today of all days our dedication to the charter must be maintained .
今天，尤其是今天，我们必须保持我们对宪章的精诚。 |
| 8. | We must maintain a military standard, an alertness, and never vary it .
我们必须保持军队的准则，应当随时注意，切勿随时变动。 |
| 9. | We must do everything in a spirit of individual sacrifice for the common good .
我们做任何一种事情都必须保持一种舍己为人的精神。 |
| 10. | To adhere to life, he must adhere to human relationships, and he caught at every straw .
要顽强地活下去，他必须保持人与人之间的各种关系，因此他争抢着每一根救命稻草。 |
