化学元素丰度是在测量上与所有元素相比较所得到含量多寡的比值。
生命若在太阳系其他地方引起相当的影响,那些对它们具有生死关键的相对化学元素丰度,无论是什么,很可能暴露它们的存在。
If life has had a comparable impact elsewhere in the solar system, the relative abundances of chemicals key for its survival -whatever they may be -could betray its presence.
铈:化学元素,周期表iii b族过渡金属中丰度最大的稀土金属。化学符号Ce,原子序数58。
Cerium: chemical element, a rare earth metal of the lanthanide series (hence having many properties of the transition elements), chemical symbol ce, atomic number 58.
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