necessary and sufficient condition

常见例句

A necessary and sufficient condition is then presented for the two level problem to admit the exact penalty approach.
本文提出了一种恰当罚函数法，给出了此双层规划具有这种恰当罚函数法的充要条件。
In this paper, Green's formula is extended to nonsmooth functions. A necessary and sufficient condition about Green's formula is gained.
把格林公式推广到非光滑函数，得到了格林公式成立的充分必要条件。
It's always been my understanding the necessary and sufficient condition of being a Christian is that you accept Jesus Christ as your lord and saviour.
我一直理解成为基督教的充分必要条件就是接受基督耶稣为你的神，你的救主。

Good analysts are likely quite skilled at mathematical modeling, but it is a necessary and not sufficient condition for being a good analyst.
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Money is a necessary but not a sufficient condition for the good life, for happiness and wisdom.
FORBES: How Much Happiness Can Money Buy?