必要的

It's essential to set a goal for yourself.

为自己定一个目标是必要的。

This was necessary since the shaft needs to be modified for this application.

这是必要的，因为轴需要为这个应用程序进行修改。

However it is not necessary to shake hands.

然而，这不是必要的。

It's necessary for us to use a short-wave radio to pick up the programmes.

我们用一台短波收音机收听这些节目是必要的。

For. It's necessary for us to use a short-wave radio to pick up the programmes.

我们用一台短波收音机收听这些节目是必要的。

"People are sick and dying of AIDS and all of it is unnecessary," he said.

"人们因为得艾滋病而生病和死亡，而这些是没必要的，"他说。

It's necessary to sign on the bag and case.

在提包和箱子上贴标签是必要的。

The system program provides the movement platform, simultaneously, but is also the PLC procedure reliability service and the signal and the information transformation carries on essential public processing.

系统程序提供运行平台，同时，还为PLC程序可靠运行及信号与信息转换进行必要的公共处理。

The probability of blocking is also reduced as is the necessary signalling information.

从而减少了阻塞概率并同样减少了必要的信令信息。

I don't even think the silicone spray was needed.

我什至不认为硅喷雾是必要的。

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