fumarole stage
... secondary fumarole 次生喷气孔 fumarole stage 喷气期 Fumarole field 火山喷气孔 ...
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由于针对喷气燃料的远期期货市场流动性不佳，绝大多数的套期保值交易都是以西德克·萨斯轻质原油期货合约为交易标的的。
Long-dated futures markets for jet fuel are highly illiquid. Much of the hedging is carried out with WTI contracts but the actual fuel is mainly refined from pricier oils.
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