He kept in touch with us while he was on vacation.他在度假期间仍与我们保持联系.Bob and his family are on vacation; they've gone to Hawaii.鲍勃和他全家在度假, 他们去夏威夷了.I like fishing for perch on vacation.我喜欢在假期中钓鲈鱼....

on vacation的音标：on vacation的英式发音音标为：[ɔn və'keiʃən]on vacation的美式发音音标为：[ɑn ve'keʃən]...

在度假中...