low SE低自尊lowadj.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-grade material劣质材料low-maturation oil低成熟油low density concrete低密度混凝土low expansion alloys低膨胀合金low enriched uranium低浓铀low-order position低位low-speed register低速寄存器Low Risk Enhancement低风险增益low rate alarm delay设定的警报下限的延迟时间Low toxic pesticides低毒农药