| 释义 |
tho·ron AHD[thôrʹŏn', thōrʹ-] D.J.[ˈθɔːrˌɒn, ˈθəʊr-]K.K.[ˈθɔrˌɑn, ˈθor-]n.（名词）- A radioactive isotope of radon, Rn 220, having a half-life of 54.5 seconds and produced by the disintegration of thorium.钍射气：一种由钍的裂解产生的Rn220的放射性同位素，半衰期为54.5秒
- thor(ium) thor(ium)
- -on 2-on2
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