Beef is the meat of a cow, bull, or ox.
roast beef.
烤牛肉。
beef stew.
炖牛肉。
beefs , beefing , beefed
beef up
If you beef up something, you increase, strengthen, or improve it.
a campaign to beef up security.
一场加强治安的运动。
Both sides are still beefing up their military strength.
双方仍在增强各自的军事力量。