常見例句雙語例句Rubies, valued as precious gems, are the mineral corundum in its red form.作為一種珍貴的寶石，紅寶石是一種紅色的礦物剛玉。Moreover, corundum and periclase have not been detected in space dust before.而且，此前在太空塵埃中還未偵測到剛玉和方鎂石。Ruby, the common name for the mineral corundum in its red form, is a precious gemstone.紅寶石是對紅色礦物剛玉的俗稱，它是一種珍貴的寶石。 返回 corundum