必需的

Basic knowledge of semaphores, Mutex, and threads are required.

基本知识信号量，互斥和线程是必需的。

They do not realize that they are deprived of the necessities of life.

却没有意识到被剥夺了生活所必需的东西。

Food and water is necessitous to us.

食品和水对我们来说是必需的。

You are needful for me, please don't leave me alone

你对我来说是必需的，请不要抛下我一个

Oxygen, carbon dioxide, and nitrogen are essential to animal and plant life.

氧、二氧化碳、氮是动植物生命所必需的。

Nitrogen is often considered to be one of the most important limiting factors for plants.

土壤氮素在农业生产中占有重要地位，是植物生长所必需的营养元素之一。

The search results of two clones ovular differential proteins showed that some of factors that peroxidation and bio-molecule damnification hurt frame and function of cell and producing ethane because sterile clone ovule was devoid of protected enzyme system.

由于胚珠较可育系存在较少量糖酵解必需的酶，加之碳源短缺可能激发糖原异生过程，使胚珠生长发育所需中间产物减少及能量短缺。

They have the necessary papers, and so do you.

他们有必需的证件，你也有。

I do not feel that I have the necessary knowledge to pass judgement on a work of modern art.

我觉得自己不具备评论现代艺术作品所必需的知识。

The coordination required to perpetrate this gait effectively is unique.

走发生。协调必需的有效地做这一步法很独特。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。