The main copper minerals are malachite, chrysocolla, little chalcopyrite, chalcosine and even little bornite and covellite.矿石主要含铜矿物为孔雀石 、 硅孔雀石, 少量的黄铜矿 、 辉铜矿及极少量的斑铜矿和铜蓝等....
I think Tessa should plump for Malcolm, her long-suffering admirer.我想特莎应该选择长期默默爱慕她的马尔科姆。Malcolm worked up the nerve to ask Grandma Rose for some help.马尔科姆鼓起勇气请罗丝奶奶帮点忙。Malcolm believed he was guilty of duplicity in his pr...
拼写发音相同但意思不同的两个单词是同形同音异义词.Two words are homonyms if they are pronounced or spelled the same way but have different meanings.发音相同拼写和意思不同的两个单词是同音异义词.Two words are homophones if they are pronounced the same way but differ in...