| 1. | It became necessary to provide drainage or sewer systems to carry such wastes away from the area .
提供排水系统或污水管道系统，把废物排出市区已成为必要。 |
| 2. | Changing economic and social conditions in the united states through the years necessitated the adoption of additional amendments to the constitution .
美国经济与社会状况因时而异，新宪法修正案的采用于是成为必要。 |
| 3. | So it is necessary to substitute sketch with calligraphy
因此以书法代替素描成为必要。 |
| 4. | As a result , proxy becomes necessary
因此，委托书的使用成为必要。 |
| 5. | An increase in the population makes birth control necessary
人口的增长使节制生育成为必要 |
| 6. | Your proposal necessitates borrowing money
你的提议使借款成为必要。 |
| 7. | In so doing , we make course corrections as necessary
通过这种做法我们使得过程校正成为必要。 |
| 8. | It is need to develop wdm driver
开发基于wdm驱动成为必要。 |
| 9. | So a new method is needed which should be quick and all - sided
因此，发展一种快速的检测方法成为必要。 |
| 10. | So , it made automation fault detection and diagnosis be indispensable
因此，使得自动故障检测与诊断成为必要。 |
