必需的

And although pricey, they are when sliding with less friction is desired.

尽管非常昂贵，但在低摩擦滑行时却是必需的。

That he needs to do space walk activities.

这是他进行太空行走所必需的。

This file is required for PS1.1 specular normal map shaders.

此文件是所必需的PS1.1镜面正常地图着色。

In addition, we also added Spirulina and other essential trace elements.

另外我们还添加了螺旋藻等人体必需的微量元素。

To fill this need, the statement of cash flows(also called the cash flow statement) is required.

为了弥补这方面的需求，现金流量报表是必需的。

Membership in the EHR Steering Committee, and provided that the agreement to grant

技术规范中为了向前兼容该技术规范草案所必需的部分。

The kit should contain necessary medicine, sun cream, insect spray and some band-aid.

该工具包应包含必需的药品，防晒油，驱蚊喷雾和一些权宜之计。

It s a good practice to use superuser privileges only when absolutely necessary .

它是一个好实践使用超级使用者特权只有当完全必需的时候。

Water is one of the materials required to sustain life .

水是维持生命所必需的物质之一。

Since it is an inverse problem, numerical techniques, such as discretization of the integral into a system of linear equations, are necessary.

由于这是一个反问题，一些数字技术比如将积分离散化为一个线性方程组是必需的。

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