Mary can type well and her mother could type well when she was young.

玛丽打字很好，她妈妈年轻时打字打得也很好。

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Using the core of type-well in Lower S_3 of Pan 'er area, the sand producing laws of loose sandstone reservoir are investigated by core flow test.

使用盘二块沙三下典型井的岩心，通过岩心流动试验，研究了疏松砂岩油藏油层的出砂规律。

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Using the core of type-well in Lower S_3 of Pan 'er area, the sand producing laws of loose sandstone reservoir are investigated by core flow test.

使用盘二块沙三下典型井的岩心，通过岩心流动试验，研究了疏松砂岩油藏油层的出砂规律。

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