Noun:

1. a clinical trial on more persons than in phase I; intended to evaluate the efficacy of a treatment for the condition it is intended to treat; possible side effects are monitored

phasesn.时期；局面；阶段名词phase的复数形式.phasen.相位；方面；局面；阶段；时期vt.逐步执行phase theory中心语phase effect相位效应phase system相位系统Phase Sketch相位图phase mixing相混合phasecontroln.相位控制phase tuning相位调谐Phase Dither相位抖动phase magnet相位磁铁phase change相变,换相