Richard refused to trade in his old Canon cameras.理查德拒绝用他的旧佳能相机以旧换新。Vendors were doing a brisk trade in souvenirs.商贩们的纪念品生意很红火。the trade-in value of a car一辆汽车的以旧换新抵价...
That's normal, believe it or not.那很正常，信不信由你。Believe it or not, he was here yesterday as large as life.信不信由你, 他昨天确确实实是在这儿.Believe it or not, that's the way it is.信不信由你, 反正事情就是这样....
Dual x - ray absorptiometry was used to measure bone mineral density.双能 X 线骨密度仪被用来股的矿物质密度.Methods: Body composition was measured with dual energy X ray absorptiometry ( DXA ).方法: 采用双能X线吸收测量法 ( dual-energyX -rayabsorptio...