2. There is agreement on the necessity of reforms.
关于改革的必要性有一致意见。
《柯林斯英汉双解大词典》
3. We were discussing the necessity of employing more staff.
我们在讨论是否需要雇用更多员工。
《牛津词典》
4. Air-conditioning is an absolute necessity in this climate.
这样的气候绝对需要有空调。
《牛津词典》
5. There had never been any necessity for her to go out to work.
她从来就没有出去工作的必要。
《牛津词典》
6. The population failed to understand the necessity for the war to go on.
人们没能理解那场战争继续下去的必要性。
《柯林斯英汉双解大词典》
7. As soon as the necessity for action is over the troops must be withdrawn.
一旦军事行动的必要性不复存在，部队必须撤离。
《柯林斯英汉双解大词典》
8. The violence of the revolutionary years was justifiable on the grounds of political necessity.
出于政治需要的立场，革命年代的暴力行为是无可非议的。
《柯林斯英汉双解大词典》
9. It would be the first time in human history that economic necessity has prevailed over military aggrandizement.
经济需要压过了军事扩张，这将是人类有史以来的第一次。
《柯林斯英汉双解大词典》
10. Travel has become a necessity.
旅行已经成为一种必需品。
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11. Necessity is the mother of invention.
需要乃发明之母。
《新英汉大辞典》
12. This necessity comes with the rise of big science.
这种必要性是伴随着大科学的崛起而产生的。
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13. The fund-raising ability is largely a product of experience and necessity.
筹集资金的能力在很大程度上是经验和必要性的产物。
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14. Obtaining good health insurance is a real necessity while you are studying overseas.
留学时，有一个好的医疗保险是非常必要的。
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15. There will be 6 billion over five years, which could help pay for new vehicles and other survival necessity.
在未来五年内将有60亿美元用于支付新车费以及其他生存必需品费用。
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16. Sometimes convenience or practical necessity or just the fancy of an influential person can establish a fashion.
有时，某种便利或实际的需要，或仅仅是一个有影响力的人物的幻想就可以引领一种时尚。
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17. If you are a manager of technology at any level, then this is your responsibility as well as a survival necessity.
如果您是某个层级技术的经理，那么这是您的职责，也是您赖以生存的必需品。
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18. Machine translation makes some parents raise doubts about the necessity for their children to learn foreign languages.
机器翻译使一些父母怀疑是否有必要让他们的孩子学习外语。
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19. Using alternative fuels and improving energy efficiency is thus both an ecological necessity and a technological challenge.
因此，使用替代燃料和提高能源效率既是生态需要，也是技术挑战。
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20. Andrew Schubert, a researcher at the institute for science policy research, says that the rising collaboration is partly out of necessity.
科学政策研究所的研究员安德鲁·舒伯特表示，这种日益增强的合作在一定程度上是必要的。
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21. At the same time, people continue to treat fire as an event that needs to be wholly controlled and unleashed only out of necessity, says Professor Balch at the University of Colorado.
22. However, few people realize the importance of basic skills. As is shown in the picture, the pupils in the class are questioning the necessity of learning basic skill such as multiplication table.
