groundmass
Without succour; with no source of aid.
plural of centreback
plural of carbanilate
(geology) The matrix of fine-grained crystalline material in which larger crystals are embedded.
地質学者は顕微鏡で火成岩を調べ、その細粒の基質に小さな互いに絡み合った結晶が含まれていることを確認した。
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