crop up

US /krɑːp ʌp/
UK /krɑːp ʌp/
"crop up" picture
1.

発生する, 現れる, 浮上する

appear, happen, or come to attention unexpectedly

:
Problems always seem to crop up when you least expect them.
問題はいつも予期せぬ時に発生するようだ。
A few interesting points cropped up during the discussion.
議論中にいくつかの興味深い点が浮上した