而使用氧化钍(二氧化钍)作为代理人迅速停止钍导致肝癌。
The use of thoria (thorium dioxide) as an agent was rapidly stopped as thorium causes liver cancer.
这项技术的支持者称，钍的储量比铀更多，而且不会产生大量的二氧化碳。
Proponents of the technology say thorium is more abundant than uranium and does not involve the release of large quantities of carbon dioxide.
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