And that role could be threatened by shortages in fuel or spiraling fuel costs.

一旦出现燃油短缺，或价格飞涨，它的这种作用就会受到威胁。

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And that role could be threatened by shortages in fuel or spiraling fuel costs.

一旦出现燃油短缺，或价格飞涨，它的这种作用就会受到威胁。

youdao