反复出现的问题，错误，疾病。

A recurring problem, error, illness.

youdao

模式是针对反复出现的问题的。

Pattern is aimed the repeated problems.

youdao

反复出现的问题最初让我研究人类大脑才华和局限性。

This recurring problem is what first led me to investigate the talents and the limitations of the human brain.

youdao

The problem is recurringly in society that it's just horrible designs.

这个问题在社会中反复地出现,那就是可怕的设计了。

哈佛公开课 - 计算机科学课程节选

Milton was always wrestling with the problem of vocation in all of its meanings, and the problem of what a calling actually is and how one actually knows one has a calling is a problem that pulsates somewhere beneath most of the lines of poetry that Milton writes.

弥尔顿经常纠结于这两个,含义，以及到底什么是神的招唤,还有人们是怎么知道他被召唤了,这些问题反复出现在,弥尔顿的诗句中。

耶鲁公开课 - 弥尔顿课程节选