If I say something happens " once in a blue moon, " it is uncommon, infrequent, rare.

如果我说某件事" once in a blue moon" ，那它就是不常见的，少发生的，罕见的。

During the 20th century, the East Anatolian Fault yielded little major seismic activity.

在20世纪，东安纳托利亚断层少发生重大的地震活动。

Something that " seldom" happens doesn't happen very often.

“少”发生的事情不会常发生。

Brachial plexus injury, pneumothorax and hemothorax are highly unlikely, but possible side effects of the surgery.

臂丛害伤害，气胸和血胸少发生，但是手术的可能并发症。

Good choices rarely happen by accident.

好的选择少是偶然发生的。

But total solar eclipses happen rarely because the moon's orbit is tilted five degrees.

但日全食少发生，因为月球的轨道倾斜了五度。

Reading is the only pleasure which fate has left me, and I miss little which passes in the world.

阅读是命运留给我的唯一乐趣， 我少错过世上发生的事情。

There have been a lot of climatic changes during that time, and very few of them have occurred at this rate.

在那段时间里发生了多气候变化，而且少有以这种速度发生的。

Svalbard has been hit by extreme rainfall in the past 10 years and seabird die-offs, something that used to happen infrequently, has become increasingly common.

过去 10 年，瓦巴特群岛遭受极端降雨袭击，过去少发生的海鸟死亡事件变得越来越普遍。

It can seldom happen, therefore, that a man of any considerable stock should quit the superior, in order to place himself in an inferior station.

因此，少会发生这样的情况：一个有相当地位的人为了让自己处于一个较低的地位而放弃了较高的地位。

It seldom happens that any part of it is applied towards the improvement of land; or is so employed as to contribute, in any respect, towards increasing the revenue of the great body of the people.

少发生它的任何部分用于改良土地的情况；或受雇于在任何方面有助于增加广大人民的收入。

Great emergencies excepted, which would rarely occur in a society of which equality was the basis, a man could only be prepared to discharge the duties of public life, by the habitual practice of those inferior ones which form the man.

除了在以平等为基础的社会中少发生的重大紧急情况外，一个人只能通过形成他的那些下等人的习惯性实践来准备履行公共生活的职责。