nece ity meaning in English

必需品

History has proved the nece ity to expand cooperative relatio between europe and asia , two major cradles of human civilization
历史已证明，扩大欧亚这两大人类文明主要发源地之间的合作关系是必要。
However , public recognition of the nece ity to provide a better quality of life for millio of people will represent the first step in finding effective solutio
然而，公众认识到为数百万人提供更高质量的生活的必要性是找到有效的解决办法的第一步。
The mathematical guarantees offered by these methods are a nece ity for compilers and verifiers , for it is unimaginable that one would use a compiler or a verifier based on heuristics that give correct results only 90 % of the time
这些方法所提供的数学保证是编译器和验证程序必需的，无法想象谁会使用一个只保证90 %正确率的基于启发式的编译器或验证程序。
It is entirely reasonable for auditors to believe that scientists who know exactly where they are going and how they will get there should not be distracted by the nece ity of keeping one eye on the cash register while the other eye is on the microscope
审查者完全有理由相信，知道自己准备做什么、怎么做的科学家不应该因为必须一只眼盯着收银机，一只眼盯着显微镜而分散了注意力。