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....
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...
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...