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Pinyin/Petroleum
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Pinyin#Pinyin tone marking
Petroleum is a dark liquid from under the ground, used for making gas and other fuels.
shiryour shih shenseh d dihxiah yehtii, yohnglair zhihzaoh qihyour her qirta rarnliaoh.