pop up

基本解釋

I could find one for every issue that popped up in my work.
對于在工作中碰到的每個問題，我總能找到一個變通的辦法。
So the question of how to land in running popped up again in its purest form.
因此，關于在跑步中如何著地的問題，應以最純粹的形式再次被提出。
Later, when she mentioned to her husband how she missed those lilacs, he popped up from his chair.
后來, 她向丈夫說起她是如何懷念那些紫丁香時, 他突然從椅子上躍起。

Well, the next lines in Homer say that one soldier popped up and said, "Of all the great things Odysseus has done for us here, that was greatest, to shut up a big mouth idiot like Thersites."
書中接著寫道,一名士兵站了出來,他說,"在奧德修斯為我們做的一切偉大事跡中,其中最了不起的,就是讓忒爾西忒斯這樣多嘴的白癡閉上嘴
耶魯公開課 - 古希臘歷史簡介課程節(jié)選
I want to point out that the zero energy is defined as when you have a naked proton -- where the electron has popped out -- that's what we've defined as zero energy up to this point when we're talking about single atoms.
我想指出，這里零點能的定義,是當我們只有一個裸露的質子,而沒有電子時-,到目前為止對零點能一直采用這樣的定義,當我們在討論單個原子時。
麻省理工公開課 - 化學原理課程節(jié)選

Several discussions popped up around the internet as to what could possibly be going on.
FORBES: The Mystery of the Amazon Refund Email
The worries about Greece also popped up where it looked like it may actually default.
FORBES: A Retort to Andrew Ross Sorkin on ETFs

If someone or something pops up, they appear in a place or situation unexpectedly.