1. 加强：beef about 抱怨 | beef up 加强 | before you are scheduled to leave 在你决定离开之时间前

2. 加强,增加,充实：bewrapped up in专心致志于,与......有关(或有牵连) | beef up加强,增加,充实 | behind someone's back在......的背后,背着

3. 招兵买马：beat to it 捷足先登 | beef up 招兵买马 | beggars can''t be choosers 身不由己

4. 加强;增强：slowdown n.减速 | beef up加强;增强 | divide vi.有分歧

verb

1. make strong or stronger

e.g. This exercise will strengthen your upper body
strengthen the relations between the two countries

Synonym: strengthenfortify