reservedly

adverb [方式副词]客气地；隔阂地；有节制地

But if we speak reservedly and thoughtfully, we want to be farther apart, that all animal heat and moisture may have a chance to evaporate.
但如果我们严肃而不苟言笑并且富于思想的，我们就要隔得远一点，让人的体温和水分都有机会蒸发掉。