be necessary

Sampling of propellants under typical operating conditions may be necessary to obtain valid capacitance information.

为了获得有效的容量资料,在典型的工作条件下对推进剂取样是很必要的.

Such tilting will be necessary.

这种改变是必需的.

To join these two pieces of metal, it will be necessary to heat them.

要把这两块金属接合起来, 就要将它们加热.

At least a year's preparatory work will be necessary before building can start.

在开始动工之前至少要做一年的准备工作。

Spraying with insecticides and fungicides may be necessary to control any insects and diseases.

也许有必要喷洒杀虫剂和杀菌剂以防止病虫害.

In several cases, additional sedation may be necessary.

对于严重的病例, 还必须镇静.

How much alteration will be necessary?

需要改多少?

As long as they lived, exertions would not be necessary to her.

只要他们活着, 是不需要她吃苦的.

I think that the on-site training will be necessary for the tank.

我想槽罐焊接工作的现场培训是必要的.

We have already agreed that secrecy may be necessary.

我们统一了意见,认为需要保守秘密.

A little gentle prodding may be necessary at this stage.

在这一阶段或有必要稍微督促一下.

The ability to do this will be necessary in future flights to distant planets.

将来飞往遥远的行星时,需要这样的能力.

It may be necessary to buy a new one.

也许有必要买个新的了。

It may be necessary to thin the sauce slightly.

可能有必要将酱汁稍稍稀释一下。

I kept the engine running because it might be necessary to leave fast.

我没让发动机熄火，因为也许需要迅速离开。