tho.ri.um

thorium的音标和读音：
DJ音标发音： [ˈθɔ:ri:əm, ˈθour-]
KK音标发音： [ˈθɔriəm, ˈθor-]

thorium的词性：
n.Symbol Th （名词）符号 Th

1. A radioactive silvery-white metallic element that is recovered commercially from monazite. Its longest-lived isotope, the only one that occurs naturally, is Th 232 with a half-life of 1.41 × 10¹⁰ years. It is used in magnesium alloys, and isotope 232 is a source of nuclear energy. Atomic number 90; atomic weight 232.038; approximate melting point 1,750⁼C; approximate boiling point 4,500⁼C; approximate specific gravity 11.7; valence 4. See table at element
钍：一种商业上从独居石中提取的放射性银白色金属元素，其自然界中寿命最长的同位素是钍232，半衰期为141×10¹⁰年。用于镁合金，同位素232是核能的来源。原子序数90；原子量232.038；熔点约为1,750⁼C；沸点约为4,500⁼C；比重约为11.7；原子价为4 参见 element

thorium的词源：

2. After Thor
源自 Thor