英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
结果
Ytterbium的结果
Ytterbium
(n.)
A rare element of the boron group, sometimes associated
with yttrium or other related elements, as in euxenite and gadolinite.
Symbol Yb; provisional atomic weight 173.2. Cf. Yttrium.