在第三章我们对离散系统引入了阻碍集的概念,并探讨了在此情形下的正常集的一些理论。
A similar obstruction would set back the LHC schedule by weeks.类似的障碍物会延迟LHC的计划数周。
Thus, they see the sun rise later and set earlier than it does for a horizon without obstruction, she said.因此,相较于毫无遮挡的情况来说,他们看到太阳升起的会晚一些,而落下的会早一些,她说。