drop by/in
phrasal verb with drop verb uk/drɒp/ us/drɑːp/ -pp-
informal
拜访，看望
to visit someone
I dropped in on George on my way home from school. 在放学回家的路上我去看了一下乔治。
Drop by and pick up that book sometime. 什么时候有空就来取那本书。
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