显微镜见到的粒子,在颜色 、 组织结构 、 均匀性以及对水的溶解和吸附性方面都各不相同.Microscopically visible particles differ in colour, texture, unmiformity and in watersolubility and absorption.分子筛具有吸附性、再生性, 热稳定性好.Molecular sieve has the advantages of good ab...
他转到屋子的那一头。He had wandered to the far end of the room.满眼金星乱转，而且越转越快。Stars appeared everywhere, spinning round and round, faster and faster.他转过头看着这个噤若寒蝉的女孩，又重复了一遍他的问题。He looked back at the abject, silent girl and repeated ...
他们走出店铺,穿过破旧的走廊,步下下陷的台阶.They went out of the store and across the worn gallery and down the sagging steps.那间下陷的谷仓倒塌后, 农夫就把它烧掉了.After the sagging barn collapsed, the farmer burned it down.泪水从她下陷的双颊流了下来.The tears rolled dow...