ประโยคภาษาจีน : 中文句子 |
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yǐ wǎng 以往 yán jiū 研究 rèn wéi 认为 píng liáng 平凉 zǔ 组 jú bù 局部 céng 层 duàn 段 fù hán 富含 ní zhì 泥质 kě 可 zuò wéi 作为 xià 下 gǔ shēng jiè 古生界 tīng 烃 yuán 源 yán 岩 dàn 但 fēi 非 kān tàn 勘探 mù dì 目的 céng 层 |
Previous research considered that local intervals of Pingliang Formation were rich in mud and could act as Lower Paleozoic hydrocarbon source rocks, but they were not exploration targets. |