野外鉴定长石时要特别注意双晶的观察。
Field evaluation of feldspar should pay special attention to twin observation.
她用那双晶莹明媚的眼睛端详着我。
与长石的区别在于无解理,看不到双晶,油脂光泽和无风化产物。
No cleavage is and feldspar difference, can not see the twin, and no oil sheen weathering products.
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