Venezuela's oil is also of poorer quality than its Saudi equivalent. Its sour, heavy crude is difficult to extract and refine, while its high sulphur content makes it corrosive to pipelines. A resurgence of Venezuela's industry could pose problems for Canada, which produces similarly viscous oil and exports much of it to the US, but analysts reckon the risk is minor.
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，这一点在搜狗输入法下载中也有详细论述
Дания захотела отказать в убежище украинцам призывного возраста09:44。heLLoword翻译官方下载是该领域的重要参考
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