必需

Most of these peptides are amidated at their C-terminals, which is essential for their full activities. The a-amide comes from posttranslational modification that is catalyzed by α-amidase (α-AE or PAM). The amidation reaction is a rate-limiting step in the biosynthesis of regulatory peptides.

大部分活性肽的C-端是酰胺化的，而且α-酰胺基为多肽的完全生物活性所必需；α-酰胺基来自多肽的翻译后加工，由α-酰胺化酶催化完成，是酰胺化多肽生物合成途径中的限述步骤。

An essential amino acid that is important for the growth and repair of tissue.

一种必需氨基酸，对组织的生长和修复有重要作用。

But in those occasions which require high precision such as electronic analytical balance, the close-loop mode must be employed to improve the precision of measurement.

但在高精度测量条件下，如电子分析天平，则必需采用闭环控制引入反馈环节，提高测量精度。

Also,the two types of networks are analytically compared in terms of structure,bandwidth,and protocol.

明确了电力电子系统网络的定义，分析并总结复杂电力电子实时系统所需网络必需具备的条件。

The kinetochore generates the force that is essential for the complex series of chromosome movements that lead to their aligment at metaphase and segregation at anaphase.

着丝点产生对一系列复杂的染色体运动所必需的力，导致染色体中期的调整和后期的分离。

It is shown that the exogenous hormones are not necessary to initiate the androgenesis,but they can promote further growth of pollen embryoids and calluses.

外源激素对于雄核发育的启动不是必需的，但对愈伤组织进一步的生长却是不可缺少的。

Sea Anemone states that it does not have to be this way.

海葵王国声明这并非是必需的出路。

This is usually performed under a local anesthetic, and often means that more extensive surgery is not required.

这是通常的表现下，局部麻醉剂，而且往往意味着更广泛的手术是不是必需的。

A skeleton definition line is required for all animating models in the game.

骨骼定义线是游戏中所有动画模型所必需的。

Organization: Institute of Chemical Engineering and Environment, Qingdao UniversityAbstract: A new Schiff base and its cupric complex of L-lysine and anisaldehyde were synthesized by stepwise synthesis method in anhydrous system, with basic essential amino acid L-lysine and natural product anisaldehyde as precursor.

摘 要：以碱性必需氨基酸L-赖氨酸和天然产物茴香醛为前体物，采用分步合成法在无水体系中制备了L-赖氨酸缩茴香醛单席夫碱及其铜配合物。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。