levelset水平集leveln.数量；等级；水平；水平线adj.平的；等高的v.弄平；夷平；对准adv.<废>水平地level ellipsoid of revolution水准旋转椭球levels of mineral exploration地质勘查的层次性level-crossing spectroscopy能级交叉光谱学level of language development言语发育水平level of aesthetic perception美感层次level of academic achievement学习层次level to level administration分级管理level-sensitive scan design电平相关扫描设计, 电平相关扫描设计法level difference maximization级差最大化level of management protocols管理协议层位