必不可少

The IV style pilus and the twitching motility mediated by the IV style pilus play an absolutely necessary role in the early stage of the pseudomonsa aeruginosa biofilm forming.

IV型菌毛及它所介导的蹭动在铜绿假单胞菌生物被膜形成的早期起着必不可少的作用。

As winter arrives the widely acclaimed Oakely opens, providing the essential winter armour to protect us all from Beijing's bitter cold, and for those heading out to the ski slopes, its sleek sunglasses are a must for piste fashion.

另外，Oakely的开业为我们带来了抵御冬日严寒的绝好装备。而对于那些热爱滑雪的人们来说，滑雪镜也是一个必不可少的时尚配件。

Control of the two main plantain diseases, yellow sigatoka and black sigatoka, is indispensable.

对两种主要病害黄香蕉叶斑和黑香蕉叶斑病进行控制是必不可少的。

In recent years, because of the technologies of mechanized conservation tillage is promoted, the application of hill-drop planter is essential.

近年来，由于机械化保护性耕作技术的推广，穴播器的应用无疑是必不可少的。

Potassium is essential for the development of a healthy root system.

8对于根系的健康发育，钾是必不可少的。

The use of the power drill isindispensable.

磨钻的使用在神经外科手术中是必不可少的。

System, motive is necessary. Certainly it is particularly important of the power transmission system.

传动系统设计，作为一个动作执行系统，动力是必不可少的，当然对动力的传递系统也就显得尤其重要了。

And in the predawn of human history, PEA was probably a pretty necessary molecule from the point of view of species survival.

在人类历史开始之前，苯基乙胺很可能是物种生存必不可少的分子。

And in the predawn of human history, PEA was probably a pretty necessary molecule Fromthe point of view of species survival.

在人类历史开始之前，苯基乙胺很可能是物种生存必不可少的分子。

With the same number of preflight duties required and fewer crew members to perform those duties, we had to adjust our time lines to get everything done.

面对着相同数量必不可少的飞行准备工作和更少的机组成员可以进行这些工作，我们不得不调整了我们的时间安排来完成所有的工作。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。