v move in a wavy pattern or with a rising and falling motion
v increase and decrease in volume or pitch, as if in waves
词态变化
原型:undulate
变形:pd
过去式:undulated
常见例句
1
among them are the black or Peruvian ipecac (Psychotria emetica), the white ipecac (Ionidium Ipecacuanha), the bastard or wild ipecac (Asclepias Curassavica), and the undulated ipecac (Richardsonia scabra).
