It occurs chiefly as stannic oxide , SnO 2 in cassiterite.主要以氧化物状态存在.One of the key problems in its origin is the solubility of cassiterite in granitic melt.锡石在花岗质熔体中的溶解度,是阐明花岗岩全岩型锡矿成因的关键....
She started to go, and then bethought herself.她动身要走时又想起了一些什么.I bethought myself a moment.我想了一下.He bethought himself of his responsibility as head of the house.他不忘自己身为一家之主的责任....
The players are in defiant mood as they prepare for tomorrow'sgame.球员在备战明天的比赛时带着蔑视对手的情绪。Roosevelt was defiant in the face of the bad news.对这个坏消息，罗斯福毫不理会。They hurled defiant taunts at the riot police, who responded i...
You can't beat soap and water for cleansing.做清洁没有比用肥皂和水更好的了。After an hour and a quarter's-worth of cleansing, toning and pampering, the difference to the way my skin felt was remarkable.经过1小时15分钟的清洁、柔肤和精心护理后，我的...