必需的

Is this yet another necessary tautology?

这是另一种必需的赘言吗？

Potassium is one of essential macronutrients required by tea tree.

钾是茶树必需的大量营养元素之一。

So at this point, all necessary files have been copied to the temp

因此，在这一点上，所有必需的文件已被复制到Temp

A broad inderstanding of basic technical theory in energy and power ergineering, including mechanics, thermology, electrical engineering and electronics

系统地掌握本专业必需的技术基础理论，主要包括力学、热学、电工与电子、自动控制及能源动力工程基础理论等

Three triplets, termed ' nonsense triplets ', do not code for any amino acid and have other functions, e.g.

在一定情况下只有前一或两个碱基对定位某一氨基酸是必需的。

Selenium is also essential for normal functioning of the immune system and thyroid gland.

硒元素同样也是免疫系统和甲状腺功能所必需的。

More exercise and a change of diet-that's what you need to tone you up .

多活动，改变一下饮食结构——这些是你增加活力所必需的。

Chromium in its trivalent form is known to be an essential trace element to our body.

铬是动物和人体内必需的微量元素，在体液中主要以三价态存在。

Tryptophan:One of the essential amino acids.

色氨酸：一种人体必需的氨基酸。

I'm worried because I didn't get all the shots I need to travel to an undeveloped country.

我很担心因为我没有打所有在一个不发达国家旅行所必需的疫苗。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐