dimorphic ; dimorphous
非双晶的 untwinned
机械的双晶 mechanical twin
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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.
youdao
她用那双晶莹明媚的眼睛端详着我。
She studied me with her sharp bright and beautiful eyes.
《新英汉大辞典》
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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