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, 集中于

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

举报, 揭发

to demand something firmly and persistently

坚持要求, 坚持

to reveal information that was meant to be kept a secret

透露, 揭露

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

告密, 揭发

to watch an event or incident without getting involved

观看, 观察

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

间谍, 秘密观察

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

致力于, 专注于