necessity
必要性───necessity
You must understand the necessity of education.───你必须懂得教育的必要性.
Water is a basic necessity of life.───水是一种基本生活必需品。
Mr Casey said he could see no necessity to add any rider on the use of firearms by police.───凯西先生说他觉得没有必要增加任何有关警察使用枪支的附加条款。
Necessity is the mother of invention.───[谚]需要是发明之母.
The necessity for nuclear nonproliferation seems clear.───防止核扩散的必要性似乎清清楚楚.
We were discussing the necessity of employing more staff.───我们在讨论是否需要雇用更多员工。
The violence of the revolutionary years was justifiable on the grounds of political necessity.───出于政治需要，革命年代的暴力行为是情有可原的。
We're going to focus on the relationship between freedom and necessity.───我们将集中讨论自由和必要性之间的关系这一问题.
Water is a necessity of life.
The people in the rural areas use mud bricks only as an immediate, practical necessity.
He emphasized the necessity of taking strong measures.
Necessity and oportunity may make a coward valient.
A friend is known in necessity.