必要

Humble people you save; haughty eyes you bring low.

卑微的人，你必要救起；傲慢的人，你必要轻视。

Who call a bird from the east, and from a far country the man of my own will, and I have spoken, and will bring it to pass: I have created, and I will do it.

我要把老鹰从东方召来，把履行我计划的人由远方叫来；我说了，必要去行；我决定了，必要去做。

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。

Many manual tasks necessary during the handling of materials require repetitive motions –pushing, pulling, bending, lifting and carrying — that place undue strain on the human body.

许多人工作业必要在材料需要处理的反复性动作-推，拉，弯曲，起重和执行-这个地方带来不必要的压力对人体。

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？

Attacking Short Balls 11-20-06 By Carl Danner Being able to flip or roll short balls is a necessary skill that is difficult for some players to learn.

进攻短球会挑或卷短球是必要的但又是很多球手很难学会的一个必要的技巧。

And what is necessary or unnecessary is certainly debatable.

我们在什么是必要的，什么是不必要的上面的确有争议。

To keep your computer performing at its best, it is necessary to manually delete all of these unnecessary files.

让您的电脑保持处於最佳，这是必要的手动删除所有这些不必要的文件。

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。

To understand the hyperbolic motion of the probe and give necessary orbit information not only the discrete positions to both ground-base or satellite autonomy device, we studied the variation of hyperbolic orbit and gave the variation equations like that of elliptic orbit.

这段轨道相比其它段虽然很短，但却是实现最终探测目标的关键弧段。为了更好地了解探测器的在这一关键弧段的运行状态，给地面测控系统或是星上自主设备提供必要的轨道信息，而不仅仅是探测器在一些孤立点上的位置和速度，有必要对双曲线轨道及其变化特征进行研究，给出类似于椭圆轨道及其变化的一些基本规律。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。