充分必要条件假言命题 hypothetical proposition of necessary and sufficient condition
充分必要条件假言推理 hypothetical inference under necessary and sufficient conditions
充分必要条件（充要条件） necessary and full condition; (又作) necessary and sufficient condition
充分必要条件假言命题的负命题 negative hypothetical proposition of necessary and sufficient conditions
充分必要条件 necessary and sufficient condition ; [数] Sufficient and Necessary Condition
十分必要 Very necessary ; Necessary
充分必要 sufficient and necessary
分秒必争 Every minute counts ; against the clock ; Minute To Win It ; Every Second Counts
充分必要积分方程 NSBIE
对于健康十分必要 essential to good health
另人沮丧的是，只有平均大约四分之一的美国公众会把浏览新闻当作每天必做的功课。
It is disheartening that only about a quarter of the American public, on average, finds news compelling on a daily basis.
你们的粮食和葡萄园所出的，他必取十分之一给他的太监和臣仆。
He will take a tenth of your grain and of your vintage and give it to his officials and attendants.
但也有批评者认为，就建造新车和(政策要求下的)处理旧车所消耗的环境成本来看，这项计划必不十分环保。
But critics argue that the scheme is not so green, pointing to the environmental costs of building new cars and destroying the clunkers (a requirement under the programme).
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