There was an impassable barrier between the white race and the one which they had reduced to slavery.在白色人种和被他们奴役的种族之间有一道不可逾越的障碍。The avenue had never been paved, and deep mud made it impassable in winter.这条大街从未铺过路面，冬天泥泞不堪...
Goal: To avoid burst apart and hardness inferior in the production of Vitamin C pill.目的: 为了解决和避免维生素C丸在生产过程中出现崩解、硬度不好的质量问题.With regard to hardness, the diamond is in a class by itself.讲硬度, 金刚钻是独一无二的....the physical proper...
During the blitz we spent the night in underground shelters.空袭期间,我们在防空洞过夜.Some of these flood shelters are on raised platforms, which have allowed government helicopters to land amid the continuing floods...其中一些防洪棚搭建在高台上...