roast beefWiktionary 原文英美构词拆解roast词干+beef词干词源说明From roast + beef. Doublet of rosbif, a reborrowing.释义名词noun1Beef cooked by roasting.2A cut of beef that has been roasted.3A cut of beef intended for roasting.4A portion of roasted beef.同族词派生词 2roast beef curtains·