必要的

Two genes, PEN2 and PEN3, are also necessary for resistance to pathogens and are required for both callose deposition and glucosinolate activation, suggesting that the pathogen-triggered callose response is required for resistance to microbial pathogens.

PEN2和PEN3两个基因对于抵抗病原体也是必要的，胼胝质的沉积和芥子油甙的激活都需要由这两个基因来完成。这表明病原体激发的胼胝质应答对于抵抗病原微生物是必要。

Corder (1973) proposed four major categories: omission of some required elements, eg "He went bus stop"; addition of some unnecessary or incorrect element, eg Does he can swim?

科德（ 1973 ）提出的四大类：漏掉了一些必要的因素，例如："他接着巴士站"；增加了一些不必要的或不正确的元素，例如：他是否可以游泳吗？

When blanket is designed, some necessary data, including tritium breeding ratio, irradiation damage ratio, intensity of activation radiation, magnet and thickness of shield, can be get through neutronics calculation. All of that must base on heat load and neutron power flux of first wall and divertor plate. So, the preparative calculation is prformed for that.

在设计包层时，需要进行中子学计算得到氚增殖率、辐射损伤率、活化放射性强度、磁体及其屏蔽厚度的计算、核加热产生率和冷却系统设计和安排的必要数据，而这一切都必须先知道第一壁和偏滤器靶板的中子壁负荷和热负荷；为此作了必要的先行准备计算工作。

Specifically, a preliminary design of the content of the programme should include : plans, the necessary elevation, some hand-painted the galley proof, and a description of some of the necessary construction design estimates.

具体地说，一份初步设计方案应该包括的内容有：平面图、必要的立面图、一些手绘的小样、一些必要的施工说明以及一份设计概算。

We may categorize things into two groups, the enjoyable and the unenjoyable; at the same time, another category can be made: the necessary and the unnecessary.

我们可以把事情分为两类：令人愉快的和不令人愉快的；同时还有另外一种分法：必要的和不必要的。

Lowest register capital of limited company is 10000 HKD, and there is no need of assets examination, while its levies tax is necessary.

最低注册资本的有限责任公司是10000港元，因此没有必要的资产审核，而其征收税是必要的。

Yawning deficits will force governments worldwide to cut back on necessary expenditure, let alone unnecessary splurging.

巨大的赤字将迫使全球政府不得不在必要的支出上有所削减，更不用说那些不必要的浪费了。

A longer wheelbase is necessary, because it will give you a stable and comfortable ride, and of course that essential room for panniers.

较长的轴距是必要的，因为它会给你一个稳定，舒适，当然是必要的空间背篓。

Whether by mail, telegraph messenger or otherwise, shall be deemed transmitted by DFA when deposited in via mail, or

只要具备必要的证明已经发出的证据，如收寄局的收据等，就认为DFA已经将报告或通知发出，也认为客户在必要

For example, owners have a certain time in the potty reading books, bubble bath in the habit of drinking red wine, when, in the design of switches, sockets, when necessary in the Toilet on the side of light source settings, and to consider whether in the tub side set temperature control whether the necessary details such as small refrigerators.

例如，业主有一个便盆看书一定的时间，在饮用红酒习惯泡泡浴时，在设计开关，插座，在厕所必要对光源的设置方面，并考虑无论是在浴缸方设定温度控制是否如小冰箱必要的细节。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。