His mood of deep pessimism cannot have been leavened by his mode of transport—a black cab.他极度悲观沮丧，而他的代步工具——一辆黑色的出租车，丝毫不能舒缓这一情绪。He leavened his speech with humor.他在演说中掺了一点幽默.A small cake of shortened bread leavened with b...
...leaves that are often downy underneath.底部常常多茸毛的树叶A kitten's fur is downy.小猫的毛很柔软....the white downy bodies of two chicks.两只小鸡仔白色的毛茸茸的身体It also inhibited the occurrence of downy mildew and Erwinia carotovora.对田间大白...
Mass flow information can be secured by using a densitometer.质量流量的数据可借助于密度计而获得.The zero point of the density scale is defined by having no specimen in the densitometer.定义密度计内设有样品时的密度为密度尺标的零点.Densitometer is an apparatus ...