迭起的英文：
happen frequently; occur repeatedly

参考例句：

Disturbances arose repeatedly.
风波迭起。

The agitation of the strike arose repeatedly.
罢工风潮迭起。

happen是什么意思：
v. 偶然遇到；发生；出现；碰巧

These things will happen.
这种事总要发生的。

It happened far back in the past.
这事发生在久远的过去。

A string of accidents happened at that corner.
在那个转角发生了一连串的事故。

frequently是什么意思：
adv. 经常地

These faculae frequently are the forerunners of sunspot formation
这些光斑常常是形成太阳黑子的先兆。

To accustom by frequent repetition or prolonged exposure.
使……习惯由于经常重复或长时间接触而适应。

He is a frequent visitor to our house.
他是我们家的常客。

occur是什么意思：
v. 发生；出现；存在

Something unexpected occurred.
发生了意料之外的事。

Symbiosis occurs in a community.
共生现象出现在群落中。

They expect bonding to occur naturally.
他们希望能够建立自然的关系。