常見例句雙語例句A mineral consisting of titanium dioxide in crystalline form; occurs in metamorphic and plutonic rocks and is a major source of titanium.一種含有二氧化鈦的礦物，呈晶體狀，見于變質(zhì)巖和火成巖中，是鈦的主要來源。A weakly magnetic black mineral found in metamorphic and plutonic rocks; an iron titanium oxide in crystalline form; a source of titanium.一種具有弱磁性的黑色礦物，見于變質(zhì)巖和火成巖中，晶體狀鐵鈦氧化物，是鈦的來源。 返回 plutonic mineral