lengthilyadv.长地；冗长地lengthn.长度；时间长短；距离；一段；距离的测量单位length adjustment长度调节length comparator长度比较仪length shear gage定尺剪切挡板length of a curve曲线的长度length modulation宽度调制Length ofbaseline基线长度length of training训练年限length of exposure曝光持续时间length measurement长度测量length shear gauge定尺剪切挡板