This is a rare event.

这是一难得的盛会。

youdao

This is a rare event, but it is up to you to prove who is responsible.

这是一个千载难逢的盛事，但它是由你来证明，谁负责。

youdao

It is a rare event when a civilization is able to ascend, as in your case with Mother Earth.

当一个文明能够提升的时候它就是一个罕见的事件，作为你们与地球母亲的实例。

youdao

The pilot reported a double bird strike - a rare event where birds enter both engines.

VOA: special.2009.01.30

The event,on July sixteenth, was a rare chance for planetary scientists to share with the public the mysteries of Mars.

VOA: special.2010.07.28

This is a rare event, so the statisticians make no special adjustment for it.

ECONOMIST: The economy

The announcement produced what has become a rare event in Washington: A large, bipartisan majority of Congress agreeing on something.

WSJ: Robert M. McDowell: The FCC's Threat to Internet Freedom

Snacking became a rare event because he knew he was eating fewer calories and wanted to make each calorie count.

CNN: Man's change began when he couldn't fit in ride with son