necessary

['nesə.səri]

adj.必要的, 必然的
n.必需品

a.

1. 必要的, 必需的[(+for/to)]

Oxygen is necessary for life.

氧气是生命所必需的。

It is necessary that he be sent there at once.

有必要马上派他到那里去。

2. 必然的, 无法避免的

Poor health is a necessary result of over-exertion.

体弱是过度劳累的必然结果。

n.

必要的物品; 必需品[P1]

She has enough money to obtain the necessaries of life.

她有足够的钱购买生活必需品。

词形变化

名词复数: necessaries |

词义辨析

同义:

a.必要的, 必需的

required  compulsory  urgent  important  obligatory  compelling  needed  essential  exigent  imperative  

同义参见:

vital  indispensable  imperious  significant  basic  pressing  necessity  desired  

反义:

a.必要的, 必需的

unnecessary  needless  

英英释义

名词 necessary:

anything indispensable

同义词：necessity, essential, requirement, requisite

形容词 necessary:

absolutely essential

unavoidably determined by prior circumstances

短语词组

if necessary

1. 如果必要的话

You can use these reference books, if necessary.

如果必要, 你可用这些参考书。

补充

necessarynecessary英:[ˈnesisəri] 美:[ˈnɛsɪˌsɛri]adj.1.必要的; 必需的It took me a year to get the necessary materials together.我花了一年的时间才把所需要的资料组织好。It is necessary that one should obey the law.一个人遵守法律是必要的。2.必然的; 不可避免的Because the company was doing more business it was necessary to expand the factory.由于公司业务的扩大, 扩大工厂是必然的。n.1.必需品He has enough money to obtain the necessaries of life.他有足够的钱购买生活必需品

例句

1. Are we teaching students the necessary skills?我们是在教授学生必备的技能吗？ 2. the colours necessary for perfect camouflage完美伪装所必需的各种颜色 3. I don't want to stay longer than necessary.我不想待太久。 4. It is necessary to examine this claim before we proceed any further.我们必须先核实这一声明才能继续下一步。 5. It may be necessary to buy a new cooker.可能有必要买件新炊具了。 6. It may be necessary for us to sell the house.可能我们得把房子卖掉才行。 7. If necessary, the airship can stay up there for days.如有必要, 飞艇能在空中停留数日。 8. The army needs men who are willing to fight when necessary.军队需要随时愿意听命战斗的士兵。 9. All the rigging had been examined, and renewed where necessary.船上的索具全都检查过, 并把该换的部件全都更换一新。 10. Wastage was no doubt a necessary consequence of war.巨大的损耗无疑是战争带来的必然后果。 11. Have you got the necessary?你钱够吗？ 12. I couldn't bring myself to kill the chicken so I let John do the necessary.鸡是非杀不可, 我狠不下心来, 就让约翰动手了。 13. they granted the necessary planning permission.他们批准了必需的规划许可。 14. it's not necessary for you to be here.你没必要到这里来。 15. a necessary consequence.必然的结果。 16. see when they need a tactful word of advice or encouragement and do the necessary.注意他们何时需要巧妙的进言或鼓励，然后做该做的事。 17. A good diet is necessary for a healthy life.良好的饮食习惯对健康的生活是必需的。 18. It's not necessary for you all to come.你们不必全都来。 19. If necessary I can take you to work that day.必要的话，那天我可以送你去上班。 20. Is it really/absolutely necessary for me to have surgery?我非做手术不可吗？ 21. The threat of a thunderstorm made it necessary to cancel the picnic.因为可能发生雷暴，必须取消这次野餐。 22. It's not necessary to wear a tie.没必要戴领带。 23. Food is necessary for life.食物是生活必需品。 24. We had all the necessary ingredients.我们已经备好所有必需的原料。 25. Apply another coat of paint if necessary. [=if it is needed]如有必要就再涂一层漆。 26. Take as much time as necessary. [=as much time as you need]需要多少时间就花多少时间。 27. She took the medicine only when absolutely necessary.只有万不得已时她才服药。 28. a medically necessary procedure医学上必要的步骤 29. Higher prices are a necessary consequence of the company's new services.更高的价格是公司新增服务的必然结果。 30. There is no necessary connection between what is legal and what is moral. [=what is legal does not always have to be moral and what is moral does not always have to be legal]法律与道德之间没有必然的联系。 31. We need the necessaries [=(more commonly) necessities] of life (to survive).我们需要生活必需品（以维持生存）。 32. I'll do the necessary [=do whatever is necessary] to get the job done.我将尽全力完成这项工作。