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- I think it is necessary to learn science. 我认为学科学是必要的。
- Sometimes it is necessary to trim those policies. 有时需要改变原先制定的那些政策。
- It is not necessary to legislate against gambling. 没有必要立法禁赌。
- It's necessary to instil the minds of the youth with lofty ideals. 把崇高理想灌输到年青人的思想中去是很必要的。
- Talent and education are necessary to make good in certain fields. 从某种意义上讲，才干与教育为成功之要素。
- But I wonder if it is really necessary to run the risks. 但是我不知道是否真的有必要冒险。
- Patience combined with diligence is necessary to success. 耐心结合勤奋是成功所必需的。
- It is necessary to get rid of bureaucratic practices. 必须清除官僚习气。
- Potassium is necessary to the existence of all living things. 钾是所有生物生存必须的。
- It is necessary to remove plaque by brushing one's teeth. 需刷牙以去除牙斑。
- I feel it necessary to make a correction. 我认为有必要修正一下。
- It is necessary to root out corruption in government. 铲除政府内部地腐败现象很有必要。
- It is necessary to delimit the anomaly clearly. 清楚地圈定异常是必要的。
- Food is necessary to maintain life. 食物是维持生命所必需的。
- It's necessary to rebuild our alma mater. 有必要重建我们的母校。
- Light and water are necessary to plants. 光和水封植物是必要的。
- Was it not necessary to oppose such a government? 这样的政府要不要反对呢?
- We think it necessary to begin with the experiment. 我们认为先做这个实验是必要的。
- In many cases it is necessary to "move away". 在许多情况下，“走”是必须的。
- Is it necessary to book the tickets in advance? 有必要提前订票吗?
