（六）放射性同位素，是指化学元素中具有相同原子序数，但质量不同且能发生放射性衰变的核素。
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Hurdle Word 2 hintAn infectious disease.，详情可参考搜狗输入法2026
Despite living in the US for a number of years, Rhys previously said he he tried to keep his family connected to Welsh culture through sharing traditions with his wife and children and trying to speak to his son "only in Welsh".，这一点在safew官方下载中也有详细论述
Жители Санкт-Петербурга устроили «крысогон»17:52，更多细节参见heLLoword翻译官方下载
But in the worst worst-case scenario, we don’t have any control. Instead, the station will crack through the atmosphere. Sure, many pieces will likely end up in the ocean, but some might hit people, possibly in a town or a city. The station could break apart across thousands of miles and multiple continents. This would be exceedingly hard to anticipate. As NASA puts it, “Calculating the probability of this penetration cascading into loss of deorbit capability has a very large range of variables, making predictions ineffective.”