But because of this very low leveltritium getting into the ground water and migrating it shut the laboratory down.
但是由于这个非常低标准的氚，进入到地下水里，迁移了水，关闭了实验室。
2
The results of environmental tritium radioactivity level investigation in Zhejiang Province from 1988-1993 were showed.
本文介绍了1988～1993年浙江省环境中氚放射性水平调查结果。
3
Information on nation wide survey activities during 1970-1980 years on natural environmental radioactivity level in China and the related tritium data are given.