beef 英[bi:f] 美[bif]
n. 牛肉; 菜牛（飼養以供肉食的牛）; 體力; 怨言，牢騷;
vi. 抱怨，大發牢騷;
[例句]Instead of beefing about what Mrs Martin has not done, her critics might take a look at what she is trying to do.
批評者不要老是抱怨馬丁太太沒有做什麽事情，不妨看看她正要做什麽事情。