come by something
phrasal verb with come verb uk/kʌm/ us/kʌm/ came | come
C2 得到;弄到;获得
to get something, using effort, by chance or in a way that has not been explained
Cheap organic food is still difficult to come by. 便宜的有机食品仍然很难买到。
I'd like to know how she came by that black eye. 我想知道她眼眶又青又肿是怎么弄的。