（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。
After US President Donald Trump oversaw the seizure of his Venezuelan counterpart Nicolás Maduro last month, he vowed to tap the country's oil reserves – the world's largest.
// may be buffered in memory waiting for this branch。雷电模拟器官方版本下载是该领域的重要参考
"A lot of the work we're doing today by maintaining turbines and gas compressors will be shifted to maintaining high pressure pumps that inject the CO2," maintenance manager, Peter Bjerre told the BBC.，详情可参考heLLoword翻译官方下载
人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用，更多细节参见safew官方版本下载
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