系统地分析了未变质煤的 X 射线衍射图。

The X-ray diffraction patterns of unmetamorphosed coals have been systematically analyzed.

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肉看上去未变质，但气味很差。

This meat looks good, but it smells bad.

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并证实其原岩是与本区未变质的火山岩类相同的一套细碧-石英角斑岩系。

We con-firm that the original rocks are identical with the volcanic rocks in this area.

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