The large number of radioactive isotopes among the heavy elements fit into three series.

重元素中的大量放射性同位素分属于三个系列.

辞典例句

Figure 1 : This chart shows the heaviest elements and their atomic makeup.

图 1: 这个图表显示的重元素和碳原子构成.

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The heaviest naturally occurring element is uranium, which has 92 protons.

自然存在的最重元素是铀, 有92个质子.

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But about 20 per cent of white dwarfs are tainted by traces of heavier elements.

但是大约20%的白矮星都有着重元素污染的痕迹.

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Among this group , most of those with traces of heavy elements also have traces of hydrogen.

这类白矮星中有着重元素痕迹者, 大多也会有氢的痕迹.

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