Make a point of backing up your files at regular intervals.一定要定期备份文件。Tapes provided the backing.磁带伴奏。Johnson now sings backing vocals for Mica Paris.约翰逊现在为迈卡·帕里斯伴唱。...
They are trying to reduce the occurrence of caner by 50 %.他们正在设法将癌症的产生率减少百分之五十.These mites carry the caner like picorna - like viruses.这些瓦螨就携带有类微小核糖核酸病毒.People are arguing that the increase in lung caner was a consequenc...