必需

Vitamin K epoxide reductase generates vitamin K hydroquinone to sustain γ-carboxylation of many blood coagulation factors.

哺乳动物维他命K环氧化物还原酶催化对维他命K苯二酚的生成，这是维他命K循环中的决定性一步，是血液凝固所必需的。

Siphon the must into the carboy.

外流必需入酸坛。

This is normally the follow-up to Carleton International School's Kindergarten program.

这通常被Carleton的幼稚园课程上，视为必需的入学考试。

Carnauba wax is harder then concrete in natural forum must be softened with solvents.

棕梠蜡在天然状态下比水泥还硬，必需透过一些溶剂来软化。

The results showed that the carpophore of the four new strains contained eight essential amino acids , side chain amino acid and arginine which were essential to the human body . However , the content of aromatic amino acid was relatively low .

测定了4个杏鲍菇新品种子实体的氨基酸含量，结果表明，4个新品种的子实体中含有丰富的8种人体必需氨基酸，支链氨基酸和带有胍基的精氨酸，而芳香族氨基酸的含量却很低。

It is essential to assess what information is necessary to carry over into the new site.

本地化过程中，考虑新网站中的必需信息很重要。

To be considered a bona fide business expense, an expense must be both "ordinary and necessary ... in carrying on any trade or business."

被视为一个真正的业务费用，这笔费用必须是"普通和必需的，在任何贸易或业务的。。。。"

However, carvone thermally decomposes at higher temperatures; therefore, a vacuum distillation is necessary.

可是，香芹酮在较高的温度下会发生热分解；因此，必需用真空蒸馏法。

In the case of particularly sensitive skins, milder humectants are required.

对于特别敏感的皮肤，必需要用温和的保湿剂。

Casein, with essential amino acid for individual growth, is the most abundant protein in milk.

酪蛋白是乳中含量最丰富的蛋白质，含有人体生长发育所必需的氨基酸。

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