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Petrol is refined from the crude oil we take out of the ground.
汽油是由地下开采的原油提炼而成的。
youdao
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The technical fluorene has been refined from the heavy wash oil with xylene.
以重质洗油为原料，二甲苯为溶剂精制工业芴。
youdao
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The technical fluorene has been refined from the heavy wash oil with xylene.
以重质洗油为原料，二甲苯为溶剂精制工业芴。
youdao