lengthsn.长度，指距离或时间（length的复数）lengthn.长度；时间长短；距离；一段；距离的测量单位length measuring长度测量length-settingn.定长Length of Column纵队长度length of thread螺纹长度length of runoff缓和长度length of branch条长length of a walk通路长度length tolerance长度公差length of stroke冲程(长度)length of hyphae菌丝量