使用“On”和“Upon”的短语动词 - 努力、冒险或揭示（上）

to direct one's attention, energy, or efforts toward a particular goal, task, or objective

专注于

to provide information to law enforcement or authorities about someone's actions, particularly illegal or unethical actions

举报

to demand something firmly and persistently

坚持要求

to reveal information that was meant to be kept a secret

透露

to give away information one has obtained about someone, particularly to someone in authority

告密

to watch an event or incident without getting involved

观看

to secretly observe someone or something with the intention of gathering confidential or hidden information

间谍

to focus one's effort, time, or attention on something in order to achieve a particular goal

致力于