If more than one species is competing for a scarce resource, the competing species usually switch to different alternative resources.

如果一个以上的物种竞争稀缺的资源，竞争的物种通常会转向不同的替代资源。

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Life is a scarce resource.

生命是一种稀有资源。

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Sadly, spectrum is a scarce resource.

可悲的是，无线电频谱是一种稀缺资源。

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Life is a scarce resource.

生命是一种稀有资源。

耶鲁公开课 - 死亡课程节选

Embryonic stem cell research has repeatedly raised ethical concerns and human eggs are a scarce resource.

BBC: Embryonic stem cells: Advance in medical human cloning

That plus a new generation of leaders who understand that capital is a scarce resource.

FORBES: A setting sun?

This one actually targets a real set of economic values over a scarce resource.

FORBES: Air New Zealand Uses Prices to go Baby Friendly