必不可少

Data backup catalogs memorizes the history procedure of data backup, and it is a essential component of the data backup software.

备份索引记录了数据备份发生的&历史痕迹&，是数据备份系统中必不可少的组成部分。

L-ornithine is a kind of middle metabolizing production, which is not make of protein.

L-鸟氨酸是人体代谢中必不可少的中间代谢产物，一种非蛋白质氨基酸。

To ensure the metros safety and high-efficiency, it is very necessary to construct a control system for the metro.

为了确保地铁安全、高效和快捷的运行，对地铁的各种机电设备进行有效的监控是必不可少的。

Even more amazing is the fact that almost 40% of them dont even know they have the disease.

运动和良好的营养，提供真实的物理回报，他们是必不可少的控制糖尿病。

And I had gone on the official records as someone more distinguished and indispensable to mankind than "just another mother."

和我在办公记录中的身份已经更加区别和必不可少的对于人类，而不是单单的&仅仅××母亲&。

The Svalbard vault is just one in a series of investments necessary to ensure that a warmer, more populous world will still be able to feed itself.

斯瓦尔巴德岛种子库仅仅是系列投资中的一项，这些投资对于确保气温进一步升高，人口更加稠密的世界能够养活自己是必不可少的。

But to discover the internal mechanism of chaos more profoundly, powerful rational mathematical models are necessary.

而要更为深刻地揭示混沌的内在机制，强有力的机理型数学模型是必不可少的。

Many adults wish that they had gone to a more progressive school.

许多教师认为学校里的纪律是必不可少的。

This causes the marketing to locate in the market marketing essential, is playing more and more vital role.

这就使营销定位在市场营销中必不可少，起着越来越重要的作用。

This is an essential reference work for all those interested in one of mankinds most pressing themes.

本书是所有对这一人类最紧迫的主题感兴趣的人所必不可少的参考书。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。