单词	可免成本
释义	可免成本avoidable cost可免成本escapable cost
随便看	preoption preoral pre-oral arm pre-oral band pre-oral band，pre-oral ciliater band preoral cavity pre-oral ciliary ring preoral ciliary ring pre-oral ciliary ringm pre-oral ciliary ring，pre-oral circlet，prototroch pre-oral ciliated band pre-oral ciliated band--pre-oral band pre-oral ciliated band，pre-oral band pre-oral ciliater band pre-oral ciliater band--pre-oral band pre-oral circlet preoral circlet pre-oral circlet--pre-oral ciliary ringm--prototroch pre-oral circlet，pre-oral ciliary ringm，prototroch pre-oral gut preoral gut pre-oral head cavity preoral lobe pre-oral loop pre-oral pit