她是个自由分子，言行不受任何人约束。

She was a free agent, answerable to no one for her behaviour.

《牛津词典》

从近连续流到近自由分子流，计算分析超声速流场的稀薄效应。

Rarefaction effect on supersonic flow fields in the transition from near continuum to near free-molecule flow is analyzed numerically.

youdao

几周前，我被人称为“迟钝的不敢面对现实的自由分子”，之后我决定应该更深入地观察这种网络行为背后的心理。

After being described a few weeks ago as "a self-lobotomised liberal who can't face the facts", I decided to look into the psychology of online behaviour a bit further.

youdao

Higher entropy basically because you're forming molecules of gas where there weren't any before, and there's more disorder in the gas phase than in the liquid. That is, the gas phase molecules have more freedom to roam.

高的熵是因为,我们产生了以前不存在的气体分子,气体的无序程度比液体大，换句话说,气相的分子，有更多的到处游荡的自由度。

麻省理工公开课 - 热力学与动力学课程节选

And to the monarchists, he was a dangerous skeptic and free thinker.

而对于君主论者，他又是个危险地怀疑分子和自由思想家。

耶鲁公开课 - 政治哲学导论课程节选

It refers to usually 'receptors' that are fixed in a cell, on a cell membrane, and 'ligands' which are dispersed throughout the body and free to diffuse around, and occasionally will find the cell.

受体这个词通常代表了,固定于细胞表面的分子,而配体分散于体内各处,能够自由扩散,它们偶尔会与细胞邂逅

耶鲁公开课 - 生物医学工程探索课程节选