beef
英音 
[bi:f]
 
美音 
[bif]
 
beef 基本解释
n.牛肉；菜牛（饲养以供肉食的牛）；体力；怨言，牢骚
vi.抱怨，大发牢骚

例句：
South korea is the fourth-largest importer of american beef .
韩国是美国牛肉的全球第四大进口商。

Banks will also be required to beef up their risk management practices .
该计划还将要求各银行加强其风险管理措施。

Their main beef is with politicians .
他们主要抱怨的是政界人士。