Some urgent business had cropped up.

出现了一些紧急事务。

Several matters cropped up at the same time.

几件事挤在一起了。

Self-conceit has cropped up among the students.

自满情绪已在学生中冒头。

A thorny problem cropped up just when we were starting the project.

工程刚一开始就蹦出了一个棘手的问题。

A few complications cropped up post-surgery.

手术后出现了一些并发症。

A few complications cropped up post- surgery.

手术后出现了一些并发症。

A few complications cropped up post - surgery.

手术后出现了一些并发症.

Many of the problems have cropped up in my mind.

许许多多的问题一直出现在我的脑海里。

All sorts of difficulties have cropped up at work.

在工作中， 各种各样的困难意想不到地出现了。

The subject cropped up in the course of conversation.

谈话中无意谈到了这个题目。