施工区空气稀薄，严重缺氧，气候寒冷。

In construction site, air is thin, oxygen is lack and it is very cold.

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单心室患者早期必须采取手术治疗，防止肺部充血和严重缺氧。

For the single ventricle, early surgical intervention is required to prevent pulmonary congestion and severe cyanosis.

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乔伊博士说，大量甲烷气体泄露可能会造成墨西哥湾水域严重缺氧。

Dr. Joye said there's so much gas leaking into the Gulf that we might be looking at severe oxygen depletion in Gulf water.

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