Carbonation is the combination of carbonate or bicarbonate ions with minerals.碳酸作用是碳酸根离子或重碳酸根离子与矿物的化合作用.How to prevent concrete from freezing - thaw and carbonation is very important.研究如何防止混凝土冻融、碳化具有重要意义.The process of c...
是什么吸引你登上舞台的?What's the attraction of going on the stage?两支部队分守舞台的左右侧，中间隔着一块空出的场地。Two armies are situated stage right and stage left with an open area separating them.“ 芝加哥不是初登舞台的地方, " 他说." Chicago is no place to get...