pop up

基本解释

I could find one for every issue that popped up in my work.
对于在工作中碰到的每个问题，我总能找到一个变通的办法。
So the question of how to land in running popped up again in its purest form.
因此，关于在跑步中如何着地的问题，应以最纯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.
后来, 她向丈夫说起她是如何怀念那些紫丁香时, 他突然从椅子上跃起。

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."
书中接着写道,一名士兵站了出来,他说,"在奥德修斯为我们做的一切伟大事迹中,其中最了不起的,就是让忒尔西忒斯这样多嘴的白痴闭上嘴
耶鲁公开课 - 古希腊历史简介课程节选
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，这里零点能的定义,是当我们只有一个裸露的质子,而没有电子时-,到目前为止对零点能一直采用这样的定义,当我们在讨论单个原子时。
麻省理工公开课 - 化学原理课程节选

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