（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。
Costly conservation?
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:first-child]:h-full [&:first-child]:w-full [&:first-child]:mb-0 [&:first-child]:rounded-[inherit] h-full w-full
"Unpopular opinion but I’m so happy it’s Clint," wrote X user @caroldirge. "Before Emily was added as a romance option he had a cute-awkward arc with her that ended with a carnival date. After, he got branded as a weirdo, creep, incel by the community. I want this blacksmith to be happy too."