词组：
roast beef 烤牛肉
beef extract 浓缩牛肉
beef noodles 牛肉面
beef jerky 牛肉干
braised beef 焖牛肉，炖牛肉，烩牛肉
curry beef 咖喱牛肉
例句：
1、They bought so much beef that some went bad.
他们买了太多牛肉，有些都变质了。
2、What's his latest beef?
他最近在抱怨什么？
3、The smell of roast beef permeated the air
空气中弥漫着烤牛肉的香味。
4、He carved the joint of beef.
他切开了那一大块烤牛肉。