mineraloid

常見例句

• The bentonite is one kind of very important nonmetallic clay mineraloid,our country bentoniteoreres our cesisextremely rich,there servesis only inferiorin USoccupies second In the world.
  膨潤土是一種很重要的非金屬礦物,我國膨潤土礦資源十分豐富,儲量僅次于美國居世界第二位。
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