必需的

For science and engineering students, have a high-level language and basic programming skills are necessary.

对于理工科的大学生而言，掌握一门高级语言及其基本的编程技能是必需的。

The Blue Horizon -2 contains the necessary elements to achieve relevant UAV missions, either as a stand-alone system or as an integral part of a total intelligence and weapon delivery system.

蓝色地平线-2包括必需的组件去完成相关无人机任务，任一的被当做一个独立系统或被当做整个情报和武器投放系统的一个部分。

Our previous studies have shown that SMAD5 is required for normal development of the cardiovascular system in vivo.

我们先前的研究表明SMAD5对于体内心血管系统的正常发育是必需的。

An intermediate knowledge and understanding of Web 2.0 is required.

一个中间的知识和Web 2.0的理解是必需的。

For the human understanding, however, which thinks only, and does not intuit, that act is necessary.

续上 要杂多的综合这种特殊活动，然而对那只思维而不直观的人类知性来说，这种活动是必需的。

In this paper,Lactobacillus bulgaricus was cultured in the medium with Zinc.

微量元素是人和动物必需的营养素，它对提高人体免疫机能、预防某些疾病的发生有着重要的作用。

As the late-flowering globalisation of the legal industry gathers pace, lawyers' appetite for the international qualifications needed to take advantage of it is growing.

随着法律行业迟来的全球化进程加快了脚步，律师们对于利用这种趋势所必需的国际资格证书的欲求也日益增强。

Result The leaf bud contained 17 kinds of amino acids (including 8 kinds of essential amino acids for human). The content of amino acids was 31 times of that in fruit of C. sinensis. And there was higher content of methionine in the leaf bud of C. sinensis.

结果］木瓜叶芽含有17种氨基酸（包括人体必需的8种氨基酸），氨基酸含量是木瓜果的31倍，并且具有较高含量的甲硫氨酸。

"You have to be able to plan for other contingencies than the one where you trash the cities, says Kevin Lewis of rand."This doesn't say you want to fight a limited war, but it is essential you be able to.

"除了砸烂城市以外，还应该作好对付其他不测事变的计划"，兰德公司的凯文·刘易斯说，"这并不是说想打一场有限战争，但是拥有这种能力却是必需的。"

The experiment of in vitro culture system shows that plant growth substances are necessary to floral sex differentiation of litchi.

离体培养系统的试验表明，植物生长物质对荔枝花性的分化是必需的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。