1、There had never been anynecessity for her to go out to work.(她从来就没有出去工作的必要。)
2、Sometimes convenience or practicalnecessity 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。)
3、At the same time, people continue to treat fire as an event that needs to be wholly controlled and unleashed only out ofnecessity, says Professor Balch at the University of Colorado.(与此同时，人们仍然认为火是一种需要完全控制的事件，只有在必要的时候才能释放出来，科罗拉多大学的鲍尔奇教授说。)
4、As soon as thenecessity for action is over the troops must be withdrawn.(一旦军事行动的必要性不复存在，部队必须撤离。)
5、If you are a manager of technology at any level, then this is your responsibility as well as a survivalnecessity.(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。)
6、The fund-raising ability is largely a product of experience andnecessity.(筹集资金的能力在很大程度上是经验和必要性的产物。)
7、This is, ofnecessity , a brief and incomplete account.(这必然是一份简略的、不完全的描述。)
8、Mostly they climb as anecessity to make money.(他们大多把登山当作赚钱的必经之路。)
9、We were discussing thenecessity of employing more staff.(我们在讨论是否需要雇用更多员工。)
10、necessity will force the swift adoption of more efficient ones.(需求将迫使我们迅速采取更有效的措施。)
11、There will be 6 billion over five years, which could help pay for new vehicles and other survivalnecessity.(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。)
12、Bynecessity, narratives are constructed from limited data.(不可避免的是，这些描述都是基于有限的数据。)
13、Thisnecessity 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。)
14、However, few people realize the importance of basic skills. As is shown in the picture, the pupils in the class are questioning thenecessity of learning basic skill such as multiplication table.(然而，很少有人意识到基本技能的重要性。如图所示，班上的学生正在质疑学习诸如乘法表这样的基本技能的必要性。)
15、The population failed to understand thenecessity for the war to go on.(人们没能理解那场战争继续下去的必要性。)
16、Obtaining good health insurance is a realnecessity while you are studying overseas.(留学时，有一个好的医疗保险是非常必要的。)
17、Air-conditioning is an absolutenecessity in this climate.(这样的气候绝对需要有空调。)
18、Using alternative fuels and improving energy efficiency is thus both an ecologicalnecessity 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。)
19、We recognize thenecessity for a written agreement.(我们认为有必要签订一份书面协议。)
20、There is agreement on thenecessity of reforms.(关于改革的必要性有一致意见。)
21、necessity is the mother of invention.(需要乃发明之母。)
22、Living in London, he felt, was an unfortunatenecessity.(他觉得在伦敦生活是迫于无奈。)
23、It would be the first time in human history that economicnecessity 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。)
24、Travel has become anecessity.(旅行已经成为一种必需品。)
25、Machine translation makes some parents raise doubts about thenecessity 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。)
26、Water is a basicnecessity of life.(水是一种基本生活必需品。)
27、Some people held that owning an automobile nowadays is anecessity rather than a luxury.(有些人认为如今拥有一辆汽车是必需而不是奢侈。)
