(noun.) a rare soft silvery metallic element; occurs in small quantities in sphalerite.
编辑:梅尔维尔
双语例句
Many hitherto unknown metals have also been discovered through the agency of the spectroscope, among which may be named caesium, rubidium, thallium, and indium. Edward W. Byrn.十九世纪发明进展.
Thallium discovered by Crookes, and Indium by Reich and Richter. Edward W. Byrn.十九世纪发明进展.