You say you feel that you're being made to choose, and so you are. Such choices as this are a by-product of freedom.你说自己感觉是在被迫作选择，确实如此，而这样的选择是自由的附带品。The raw material for the tyre is a by-product of petrol refining.制...
刻划了非负符号模式矩阵的强迫(蕴含)幂等性.The potential idempotence of nonnegative sign pattern matrix is described.该模型具有数值可加型标准综合函数所具有的性质, 即单调性 、 有界性和幂等性.This model occupies some properties of additive standard synthesis function, namely, ...