intermittent negative pressure ventilation
消极优生学
negative eugenics
又称“预防性优生学(preventive eugenics)”。研究如何 降低人群中产生不利表型的基因频率,以改善人类的遗传素 质的科学。
相关词条
negative definition
negative temperature coefficient thermistor【电】
negative peak peak
negative chemotaxis
negative eugenics; preventive eugenics
registering of the difference of positive and negative actuation
negative interference