come to think of it
US /kʌm tə θɪŋk əv ɪt/
UK /kʌm tə θɪŋk əv ɪt/

1.
そういえば, 考えてみれば
used to introduce a new thought or a realization that occurs to one at the moment of speaking
:
•
Come to think of it, I haven't seen John all day.
そういえば、ジョンを一日中見ていないな。
•
We should invite Sarah too. Come to think of it, she loves parties.
サラも招待すべきだ。そういえば、彼女はパーティーが大好きだ。