Free radicals are atoms or molecules with unpaired electrons .

自由基是具有未配对电子的原子或分子。

A free radical is a molecule that has an unpaired electron .

自由基是带有不成对电子的分子。

Free radicals are atoms or groups of atoms with unpaired or unbalanced electrons .

自由基是单个原子或原子团破坏或扰乱电子。

A chromosome having no homologue , especially an unpaired x - chromosome .

单染色体没有同系物的饿染色体，尤指不配对x－染色体。

They are more reproductively successful than unpaired females .

和未配对的雌性相比，她们更能成功繁衍后代。