low COD低CODlowadj.低的；少的；低落的；低声的；卑劣的；低等的adv.低地；低声地；低下地；廉价地n.低水平；低价；低谷v.哞哞叫low-pressure absorption well低压漏失井lowest distinguishing ancestor最小可辨识祖先Low-benefical cypress forest柏木低效林Low real estate occupancy rate低房地产占有率lowest empty molecular orbital最低空缺分子轨道low-head hydroelectric plant低水头电站low-pressure operation wells低压油气井low income disadvantaged group低收入困难群体low-growning ash of Texas.得克萨斯州生长较慢的梣木。low head of hydratation cement低热水泥