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to focus on
[动词]
to direct one's attention, energy, or efforts toward a particular goal, task, or objective
专注于, 集中精力于
Ex: She focused on completing the challenging assignment.她**专注于**完成具有挑战性的任务。
to inform on
[动词]
to provide information to law enforcement or authorities about someone's actions, particularly illegal or unethical actions
告发, 举报
Ex: The informant played a crucial role in helping the authorities inform on the corrupt politician 's bribery scandal .线人在帮助当局**举报**腐败政客的贿赂丑闻中发挥了关键作用。
to insist on
[动词]
to demand something firmly and persistently
坚持, 要求
Ex: Despite the delays, they insisted on completing the project according to the original plan.尽管有延误，他们仍**坚持**按原计划完成项目。
to let on
[动词]
to reveal information that was meant to be kept a secret
透露, 泄露
Ex: She accidentally let on about the surprise party when she mentioned the cake .当她提到蛋糕时，不小心**泄露**了惊喜派对的事。
to tell on
[动词]
to give away information one has obtained about someone, particularly to someone in authority
告发, 打小报告
Ex: I wo n't tell on you for accidentally breaking the vase if you help me clean it up .如果你帮我清理，我不会因为你意外打破花瓶而**告发你**。
to look on
[动词]
to watch an event or incident without getting involved
旁观, 作为观众观看
Ex: The soldiers looked upon in horror as the battle raged before them.士兵们惊恐地**看着**战斗在他们面前激烈进行。
to spy on
[动词]
to secretly observe someone or something with the intention of gathering confidential or hidden information
监视, 暗中观察
Ex: The technology company faced allegations of developing software to secretly spy on users and collect personal information .这家科技公司面临指控，称其开发软件秘密**监视**用户并收集个人信息。
to work on
[动词]
to focus one's effort, time, or attention on something in order to achieve a particular goal
致力于, 专注于
Ex: She is working on improving her language skills by practicing every day.她通过每天练习**致力于**提高她的语言技能。
| 使用'On'和'Upon'的短语动词 |
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