单词	preparation before class
释义	preparation before class 课前准备
随便看	external frame memory external frame of a container external fraud risk external frequency external frequency control external frequency-doubled external frequency source external friction External friction plate external friction principle external frontal crest external frontal process external frontal spine External frontal tobe craniotomy external fronto ethmo sphenoidal operation external fronto-ethmo-sphenoidal operation external fronto-ethmo-sphenoidal opera-tion External fruit color external frustration external fuction external fuel external fuel tank external function external function call external function identifier