Air cannot penetrate between the soil particles, making the soil oxygen-poor.

空气不能穿透土壤颗粒，这使得土壤中缺少氧气。

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First, they considered the possibility that seasonal upwellings of toxic or oxygen-poor bottom water were responsible.

首先，他们考虑了有毒的或者无氧的底部水流的季节性上升造成这种灾难的可能性。

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The professional ones knew that the concreting construction was a very headachy problem in the oxygen-poor environment.

内行人都知道，在高原缺氧的环境中，对于砼施工是个十分头痛的问题。

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First, they considered the possibility that seasonal upwellings of toxic or oxygen-poor bottom water were responsible.

ECONOMIST: What killed Fossil Lake?

But it concludes that the oil is continuing to break up and disperse underneath the surface, making the emergency of a major oxygen-poor dead zone unlikely.

CNN: No signs of 'dead zone' in Gulf, feds say

The EPA pulled off the feat by sharply increasing the amount of oxygen-poor exhaust that is recirculated into the combustion chamber and increasing the pressure of the fuel being forced into the cylinder.

FORBES: EPA, Inc.