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...
He took out a slab of cheese, pared off a slice and ate it hastily.他拿出一大块奶酪,切下一片,匆忙吃了。The number of Ministries has been pared down by a third...部委的数量已经减少了1/3。The number of Ministries has been pared down by a third.部委的数量已...