He's a man up in the air you know he's so detached he doesn't have his feet on the ground.

他是个生活在空中的人,十足超然,从不脚踏实地。

耶鲁公开课 - 政治哲学导论课程节选

Optimistic people, and again, not Pollyannaish detached optimism, but grounded optimists, on average, live significantly longer.

乐观的人，不是指盲目的乐天派，而是脚踏实地的乐观主义者，平均而言，明显更加长寿。

哈佛公开课 - 幸福课课程节选