necessary
adj. 必要的; 必然的
n. 必需品
Something that is necessary is needed in order for something else to happen.
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。
We will do whatever is necessary to stop them...
我们要采取一切必要措施去阻止他们。
A necessary consequence or connection must happen or exist, because of the nature of the things or events involved.
Wastage was no doubt a necessary consequence of war...
巨大的损耗无疑是战争的必然结果。
Scientific work is differentiated from art by its necessary connection with the idea of progress.
科学工作与艺术的区别在于它与人类进步有着必然联系。
Necessaries are things, such as food or clothing, that you need to have in order to live.
...a small parcel of necessaries tied up in a handkerchief and carried on a stick.
用手绢包好挑在棍子上的一小包生活必需品
If you say that something will happen if necessary ,when necessary, or where necessary, you mean that it will happen if it is necessary, when it is necessary, or where it is necessary.
If necessary, the airship can stay up there for days to keep out of danger...
必要时,飞艇能在那里停留数天以躲避危险。
The army needs men who are willing to fight, when necessary...
军队需要在必要时愿意投入战斗的军人。
1. anything indispensable;
1. absolutely essential
2. unavoidably determined by prior circumstances;
indispensable, essential, necessary, requisite
这些形容词均有"必不可少的,必需的"之意。
a necessary evil
无法避免的坏事;不得已的事
They were ready to die , if necessary, for their country.
必要时, 他们愿为国捐躯.
They always sum up their ( work ) experience whenever it is necessary, so they improve rapidly.
他们总是随时总结经验, 所以工作质量提高很快.
He wasn't good navigator, so it is necessary that the coastline remain in sight as he moved from one harbor to the next.
他不擅航海, 所以当他从一码头驶到另一码头时,得一直沿海岸线航行.
He believed that in building socialism it was necessary to make thorough plans on behalf of the state.
他认为搞社会主义,要替国家好好打算盘.
It's necessary for leading cadres to keep frequent contacts with the masses.
领导应和群众经常见面.