不定期出版，不定期发行

contour intervals───等高线间距，等高线间隔

irregular variable───不规则变星

irregular variables───不规则变量

irregularities───n.[物]不规则行为

irregular variable stars───不规则变星

at intervals───时时，不时；相隔一定距离（或时间）

class intervals───[统计]组距，标度分组间隔

He visited his parents at irregular intervals.───他不定期地看望父母。

Cars passed at irregular intervals.───断断续续地有汽车驶过。

As the tide made, it flapped heavily at irregular intervals against the shore.───潮水在涨, 没准儿隔多大工夫,就会掀起一阵波浪拍岸,澎湃有声.

Cars passed at irregular intervals.───汽车以不规律的时间间隔驶过。

He visits us at irregular intervals.───他不定期地来探访我们.

One that serves or appears at irregular intervals, especially a temporary worker.───'临时工'.''不定时服务或出现的人, 尤其指''.'临时工'. ''.

He visited his parents at irregular intervals.

He visits us at irregular intervals.

The shrieks continued at irregular intervals as the creature walked the woods.

One that serves or appears at irregular intervals, especially a temporary worker.

Sisley was an Impressionist painter and exhibited in five of the eight Impressionist exhibitions held at irregular intervals between 1874 and 1886.

Beamish only returned to Britain at irregular intervals .

Cars passed at irregular intervals.

They met at irregular intervals.

They were set at irregular intervals so that it was difficult to achieve any rhythm in the descent.