crop up

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

出現, 發生, 冒出

appear, happen, or come to attention unexpectedly

:
Problems always seem to crop up when you least expect them.
問題總是在你最不經意的時候出現
A few interesting points cropped up during the discussion.
討論中出現了一些有趣的觀點。