intensify:vi. 增强,强化;变激烈vt. 使加强,使强化;使变激烈The anti-corruption bureau intensified the strength of striking illegal activities.反贪局加大了打击非法活动的力度。tighten:vt. 变紧;使变紧vi. 绷紧;变紧The athlete tightened his shoelaces before running.运动员跑步前把鞋带系紧。