1.
Thing that is essential or urgent
必要的事；紧急的事；必须履行的责任；需要；必要性
2.
Awaken to the necessity of...
认识到。。。的必要性
3.
essential ingredients.See Synonyms atindispensable
必要的构成要素参见
4.
teleological necessity
目的论的必要性 目的论的必要性
5.
Fourth, it is imperative to establish essential rules and regulations.
第四，必须建立必要的规章制度。
6.
You must comply with all the necessary formalities.
你必须遵照所有必要的正式手续。
7.
You decided what to do yourself and, if necessary, you lead the crowd.
“你必须保持主见，必要时，破浪而行。”
8.
We must bestir ourselves to take the necessary action.
我们必须积极（奋力）采取必要的行动。
9.
Civilization is a limitless multiplication of unnecessary necessities.
文明是不必要的必需品的无限增加。
10.
You must bestir yourself to take the necessary action.
你必须自我振作去采取必要的行动。
11.
On the contrary, proper legal action must be taken against them.
相反，必须给予必要的法律的制裁。
12.
Above all, you must collect the necessary materials.
首先，你必须把必要的资料搜集起来。
13.
The Necessity,Inevitability and Limitations of Language Planning;
语言规划的必要性、必然性和局限性
14.
CERTAINTY AND NECESSITY OF THE REFORM OF THE SHORT STORY MAGAZINE;
论《小说月报》改革的必然性和必要性
15.
On the Necessity of Sticking to Two Principals Without Fail in New Era;
论新时期坚持“两个务必”的必要性
16.
Was it necessary that my uncle should be informed?
有必要通知我叔叔吗？
17.
Is there any need for you to go there?
你有必要去那里吗?
18.
needless work, trouble, worry
不必要的工作、 麻烦、 烦恼.