戀愛男女八大禁忌!你做錯了幾項?
Crystal twinning - Wikipedia, the free encyclopedia 八項全中!要回家跪主機板了... Simple twinned crystals may be contact twins or penetration twins. Contact twins share a single composition surface often appearing as mirror images across the boundary. Plagioclase, quartz, gypsum, and spinel often exhibit contact twinning. Merohedral tw...
全文閱讀