岩;Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.
主要由石英、长石、云母等矿物微粒构成，其直径在0.05~2mm之间。
Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.
主要由石英、长石、云母等矿物微粒构成，其直径在0.05~2mm之间。
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