| 1. | Iron corrodes unless it is greased or kept clean .
如果不涂油或保持清洁铁便会腐蚀。 |
| 2. | 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。 |
| 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. | Film should be kept clean, dust free, and handled only by the edges .
胶片应保持清洁，没有灰尘，用手只能拿胶片的边部。 |
| 5. | Keep it clean for your benefit and the benefit of others
为人为己，保持清洁。 |
| 6. | Keeping clean is a safeguard against disease
保持清洁是抵御疾病的防护措施。 |
| 7. | Keep cleaning it will safeguard you against disease
保持清洁能预防疾病。 |
| 8. | Nails must be kept clean , short and well trimmed
指甲应修剪整齐，不留长指甲，保持清洁。 |
| 9. | It might help a little if only you would keep clean
你只要愿意保持清洁，可能就会好一些。 |
| 10. | You must make sure all your lamps work and are clean
确保所有车灯均能亮著，而且保持清洁。 |
