（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。
Fincke has said he is currently "doing very well" and still participating in standard post-flight reconditioning at NASA's Johnson Space Center in Houston. "Spaceflight is an incredible privilege, and sometimes it reminds us just how human we are," he said. "Thank you for all your support."，推荐阅读旺商聊官方下载获取更多信息
with: #anyMessage: -> [:pattern | pattern beBinary ];，更多细节参见雷电模拟器官方版本下载
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