Jim was going to skydive, but chickened out when he got on the plane. ( chicken out )吉姆本来要玩跳伞, 但是在上了飞机后却临阵退缩.My classmates were going to get tattoos, but then chickened out.我同学本来要去刺青, 但是后来却临场退缩.He chickened out at the la...