必需的

Krill contains all of the essential amino fatty acids required by salmon and trout to survive.

磷虾体内含有鲑鱼和鳟鱼生存所必需的所有的氨基脂肪酸。

He quotes Robert Schuller who says that a new reformation is needed and that being one centering on self-esteem.

他援引罗伯特许氏人士说，一个新的改革是必需的，是一个围绕着自尊。

PC . No expensive SCSI card or cable is required.

没有昂贵的SCSI卡或电缆是必需的。

Corporate culture as emperor of wine are natural self-color, self-fermented sweet, mellow taste, refreshing soft, alcohol co-ordination body, flavor, containing more than 20 kinds of essential amino acids and various vitamins and beneficial trace elements and rich containing anti-cancer element of the king -"Se", is rich in nutrients, suitable for middle-aged and old, such as President, and the vast numbers of people drinking, can be medicine or seasoning cuisine.

象都皇酒纯天然自生色泽，发酵自生甜味，口味醇厚，柔和爽口，酒体协调，风味独特，内含二十多种人体必需的氨基酸及多种维生素和有益微量元素，并富含抗癌元素之王——"硒"，营养十分丰富，适合女士及中老年等广大人群饮用，亦可入药或作美食佳肴的调料。

Why, then, are so many single men seem lonely, lonely to the point of being self-destructive?

事实上，我们教育自己的儿子们：所有这些都是成为一个男人所必需的。

Customers will need to buy a special set-top box before using the service, but no computer is necessary.

消费者在使用这项服务之前，需要购买一个专用的机顶盒，不过电脑并不是必需的。

No prior knowledge of sign language is required.

没有先验知识的手语是必需的。

They are kernmantle constructed, and although pricey, are used when sliding with less friction is desired..

它们是由编织绳构造而成的，尽管非常昂贵，但是在低摩擦滑行时却是必需的。

Solubilization is required of any protein to be purified.

增溶溶解对于任何要纯化的蛋白质都是必需的。

The first argument is required, and specifies the tag name of the element to create.

第一个参数是必需的，并指定元素的标记名称创建。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷