pitchstone
美 英
英漢解釋
英英解釋
例句
The pearl ore includes the pearlite, shines black the crag and the pitchstone.
珍珠巖礦包括珍珠巖,黑曜巖和松脂巖。
The pitchstone has the unique resinous luster, the water content 6~10%;
松脂巖具有獨特的松脂光澤,含水量6~10%;