crop up

突然发生； 突然出现

Studies have also shown that new cases of type 1 diabetes crop up more often in winter, when there is less sunshine all around, than in summer.(研究同样表明，那些突然发生的1型糖尿病的新案例，大多出现在冬季，由于与夏季相比，周围的阳光照射较少。)

Having a comfortable cushion of while traveling lets you handle real emergencies as they crop up.(旅行拥有一个后备资金，它会让你真正的紧急情况时不会感到焦急。)

Keep calm when problems crop up.(遇事冷静。)

New tools crop up frequently, while others are eternally modernized and adapted to suit emerging best practices.(经常会出现新工具，同时老工具常常会改进以适应新的最佳实践。)

You'll go somewhere else where similar problems will crop up again, and you'll leave that new place too.(您跑到别的某个地方，在那里相似的问题突然再次出现，而您又会离开那个新地方。)

Did something unexpected crop up?(是不是有一些意想不到的事情突然发生?)

The same principles of good design crop up again and again.(同样原则支配着不同领域的设计。)

It's good to plan and prepare, but there comes a time when we should let things roll and deal with problems as they crop up.(能计划和准备很好，但是当问题出现时，我们需要解决问题并让事情继续。)

But I wouldn't be surprised if little things crop up here and there where the code should work but doesn't.(但如果随处出点小问题，那些本应该行得通的代码就会行不通，我不会对此感到惊讶。)

As the drug grew in popularity, stories began to crop up about people eating in their sleep.(随着这种安眠药的流行，发生了多起人们在睡觉时进食的事件。)

verb

1. appear suddenly or unexpectedly

e.g. The farm popped into view as we turned the corner
He suddenly popped up out of nowhere

Synonym: pop uppop

1. (常指出其不意地)出现，发生
If something crops up, it appears or happens, usually unexpectedly.

e.g. His name has cropped up at every selection meeting this season...
他的名字突然出现在这一季所有选举会议上。
e.g. Problems will crop up and hit you before you are ready.
你还未准备好，问题就会突然出现并打击你。