necessary

adj.

必要的；强制的；必然的；不可避免的

n.

必需品；

复数：necessaries

if necessary如果必要的话

necessary for所必需；对…是必要的

necessary condition必要条件，充分必要条件

when necessary在必要的时候

as necessary必要时

absolutely necessary绝对必要

necessary and sufficient condition充要条件；必要且充分的条件

where necessary必要时；需要时；必要地方

sufficient and necessary condition充要条件；充分必要条件

necessary evil n. 无可避免之灾祸

necessary connection必然联系

1. She will make necessary arrangements.
   她会作好必要的准备。
2. If necessary, please warehouse the goods.
   如有必要，请将该货存入仓库。
3. The necessary outcome of a war is a fall in production.
   战争带来的必然结果就是生产力下降。

Minimum Information Necessary for Quantitative Real-Time PCR Experiments
Minimum Information Necessary for Quantitative Real-Time PCR Experiments
Human papillomavirus is a necessary cause of invasive cervical cancer worldwide.
The Transcription Factor GATA-3 Is Necessary and Sufficient for Th2 Cytokine Gene Expression in CD4 T Cells
Identification and inhibition of the ICE/CED-3 protease necessary for mammalian apoptosis.
Activation of MAP kinase kinase is necessary and sufficient for PC12 differentiation and for transformation of NIH 3T3 cells
Assessing the quality of reports of randomized clinical trials: is blinding necessary?
Pillars Article: The Transcription Factor GATA-3 Is Necessary and Sufficient for Th2 Cytokine Gene Expression in CD4 T Cells. Cell...
The IκB Kinase Complex (IKK) Contains Two Kinase Subunits, IKKα and IKKβ, Necessary for IκB Phosphorylation and NF-κB Activation
The IkappaB kinase complex (IKK) contains two kinase subunits, IKKalpha and IKKbeta, necessary for IkappaB phosphorylation and NF-ka...