hammerlock

noun

1. 锁臂（将对手手臂扣盖在其背部）
   a way of holding sb so that their arm is bent behind their back and they cannot move

1. Innovation hotspots in Europe and Asia are signaling an end to the America's near hammerlock on global technology startups, according to a survey of venture capitalists worldwide.
   根据一项全球范围内的风险投资调查，欧洲和亚洲成为创新热点地区，预示着美国作为全球科技创新企业老大的地位即将终结。

noun

1. a wrestling hold in which the opponent's arm is twisted up behind his back