Hedge funds have placed one of their largest ever bets on a rally in oil prices, just as evidence mounts that energy companies are hunkering down for a delayed recovery.
对冲基金纷纷押注于油价上涨，规模已达到创纪录水品。而越来越的证据显示，能源企业则认为油价反弹将姗姗来迟。
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