pop up
[phrasal verb] informal 1
: to appear in usually a sudden or unexpected way突然出现；冷不防冒出 -
Coffee shops seem to be popping up everywhere.咖啡店现在似乎随处可见。
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New evidence has been popping up every day in the trial.在审讯过程中，新的证据每天不断出现。
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Problems kept popping up.问题层出不穷。
2
baseball : to hit a high fly ball that does not go very far : to hit a pop fly击出小腾空球 — see also pop-up