The iron oxides in rock crystals are specularite, hematite and lepidocrocite.
晶中铁氧为镜铁矿、赤铁矿、纤铁矿。
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We wish nothing, save to be alone and to learn, and to feel as if with each day our sight were growing sharper than the hawk's and clearer than rock crystal.
一无所求, 只想独习, 感每一的视力都变得比鹰眼更锐利, 比水晶更清晰。
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