来吧，比尔。给汤姆寄张卡片让他高兴高兴吧。Come on, Bill. Send Tom a card and make his day.“这听起来是极为令人生畏的艰苦工作。”西比尔后来说。"It sounds the most fearful hard work," Sybil said later.林肯公园的广告插图出自比尔·霍夫斯塔特之手。The artwork for the LP was done by Bill Hofsta...
釉质是身体中最硬的组织最富于钙质.Enamel is the hardest structure of the body and the richest in Calcium.洗牙会对牙釉质造成伤害 吗 ?Does the meeting that wash a tooth cause harm to enamel?采用维氏显微硬度仪测定经饮料浸泡后牙釉质表面显微硬度的变化.The enamel surface microhardnes...
Finding a volunteer to write the computer program isn't a problem.找个志愿者编这个计算机程序不成问题。She often does volunteer labour during holidays.放假时她常去参加义务劳动.Victory in the civil war had been achieved by a mainly volunteer army....