Taxis on a rainy New York night are rarer than sunshine.

在纽约的雨夜打车比见到阳光还难。

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Moonbows are rarer than rainbows.

月虹比彩虹更罕见。

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And several are even rarer than gold.

有集中甚至比黄金更稀有。

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Now admittedly,dying as a joint undertaking is far rarer than dying alone.

无可否认共同死亡比单独死亡少见得多。

耶鲁公开课 - 死亡课程节选

An ordeal like Dorothy's is shocking, but thankfully it is rarer than many believe.

BBC: Protecting the elderly

The Scottish wildcat was now much rarer than the black rhino, he said.

BBC: When is a wildcat really a wildcat?

It's much rarer than in the general population because these are fit young guys, but you cannot pick up the subtle abnormalities.

CNN: Fears for stricken soccer player Muamba's recovery