krypton

Xenon and krypton are not retained by the body so they have little effect.

氙和氪不能在人体内停留所以对人体影响很小。

The krypton and xenon isotope ratios in the gas samples provided a surprising result: They did not match the ratios found in the primordial cloud that spawned the solar system.

气体采样中的氪和氙同位素比值产生了一个令人吃惊的结果：这些比值跟在形成太阳系的原始云团中所发现的比值不一致。