这名重量级拳击冠军将尝试挑战霍利菲尔德的世界冠军头衔。The heavyweight champion will be given a shot at Holyfield's world title.我正想换工作，想尝试点不一样的事情来挑战一下自己。I'm trying to move on and stretch myself with something different.幸福的秘诀就是要不停地给自己设定新的挑...
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, ...