'On'および'Upon'を使用した句動詞 - 努力、危険を冒す、または明らかにする (オン)

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

何かに集中する

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

to demand something firmly and persistently

to reveal information that was meant to be kept a secret

何かを明らかにする

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

to watch an event or incident without getting involved

遠くから何かを観察する

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

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