必须的

At much higher concentration s, carbon dioxide displaces the oxygen in air below levels necessary to support life.

在更高的浓度下，二氧化碳取代了空气中的氧，氧浓度降到维持生命所必须的浓度以下。

For the habituated flower addict, some kind of flower-fix is urgently needed.

习惯于花朵的人，某些品种花朵的复原是非常必须的。

All this impedes the efficient exit and entry of institutions that make for a vibrant local banking sector.

这些都阻碍了为建立一个有活力的地方银行业而必须的机构进出的&优胜劣汰&原则。

Some ethnic groups, such as Asians and Native Americans, also possess less of the enzyme that metabolizes alcohol than other groups.

另外，一些人种，比如亚洲人和土著美洲人身体产生的代谢酒精必须的脱氢酶的量也比其他人种少。

All rosy and vulnerable at the same time as being the most awful pain.

与此同时，所有美好的必须的东西，同时也是最糟糕的痛苦。

Although most people believe that formal education is required for scientific success, a college diploma is not always necessary.

尽管大多数人认为科学的成功需要正规的教育，文凭并非总是必须的。

Whether the process of objectifying consciousness is more properly in the realm of physiology, psychology or philosophy is open, but the specific phenomenological method required for the study of consciousness is introspection (Dennett 1978) and introspection is the first stage of passive meditation.

让意识概念变得更加客观化的过程无论是划归生理学、心理学还是哲学分类完全可以商榷，但是研究意识所必须的现象学方法便是内省，而内省正是被动冥想的第一个阶段。

All of this new functionality has been necessary, but some of it has outgrown this X-centric library.

这些新功能都是必须的，但其中的一些已经超出了以X为中心的函数库。

Plasters, dressings, bandages and gauze depending on where you're going you may need to include some sterile dressings

石膏，敷料剂，绷带和纱布（可以根据你要去的地方而带上一些必须的，消过毒的敷料剂

To best fight the ravaging affects of this bacteria antibiotics are needed .

以最佳打斗场面的破坏性影响，该种细菌感染的抗生素是必须的。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。