be necessary

It may be necessary to thin the sauce slightly.

可能有必要将酱汁稍稍稀释一下。

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.

It may be necessary to buy a new one.

也许有必要买个新的了。

How much alteration will be necessary?

需要改多少?

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。

We have already agreed that secrecy may be necessary.

我们统一了意见,认为需要保守秘密.

It might be necessary to make a few slight modifications to the design.

也许有必要对这个设计稍作几处修改。

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.

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.

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.

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。

It is necessary to examine how the proposals can be carried out.

有必要调查一下怎样才能实施这些方案。

Some adjustment of the lens may be necessary.

可能需要调整一下镜头。

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.

It was concluded that the level of change necessary would be low.

结论是，需要作出的变更程度很低。

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.

Such tilting will be necessary.

这种改变是必需的.

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.