colloquial. to be on about: to keep talking about, to harp on, to speak or write about (a subject). to be on at (also to be on to): to nag or…
单词 | θ115407 |
释义 | the world > relative properties > number > arithmetic or algebraic operations > transformation > expressing relation in mapping [preposition] (2) to be on about1907 colloquial. to be on about: to keep talking about, to harp on, to speak or write about (a subject). to be on at (also to be on to): to nag or… into1949 Mathematics. Used to designate a mapping (of one set ‘into’ another (sense A. 6a)) that is not necessarily ‘onto’. |
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