（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。
A young woman who is battling against social media giants took the stand Thursday to testify about her experience using the platforms as she was growing up, saying she was on social media “all day long” as a child.
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Over time, as people are uprooted from their agricultural communities as industrialisation tears apart people's familiar attachments, individuals become "alienated", he says. "They start looking for one other individual to save them, to save them from the wretchedness of their lives."
And Cruz will probably be happy with ticket sales. Eight of his remaining 10 UK dates are sold out.