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to touch upon
[phrase form: touch]
01
to make a brief reference to a particular topic in the course of discussing something broader
例
During the presentation, the speaker touched upon the importance of teamwork in achieving organizational goals.
While discussing the main plot of the novel, the author tangentially touched upon a subplot involving a secondary character.
The documentary touched upon the impact of social media on mental health and self-esteem.
She touched upon the sensitive topic lightly to avoid causing discomfort.