In the case of a ligand-receptor, a chemical signal in the form of a concentration of ligand gets converted into a biochemical signal.

在配体-受体系统中,配体浓度这种化学信号,转化为生化信号

耶鲁公开课 - 生物医学工程探索课程节选

But when the concentration in the alloy is 50/50 by mole, something magical happens.

但是当合金中的浓度,是1比1的时候，有些神奇的事发生了。

麻省理工公开课 - 固态化学导论课程节选

Now, we're not thinking about total antibody concentration because you already have a lot of antibodies circulating within your blood and in your fluids.

现在,我们先不考虑抗体总浓度,因为你的体内已存在许多抗体,在血液以及体液中循环

耶鲁公开课 - 生物医学工程探索课程节选

There we see in Book II Aristotle offering his criticism of the claims for the sort of excessive unification of centralization concentration of property.

我们在第，II，册中看到,亚里士多德提出了这个评论,针对过度要求,集中一致性,集中财产的主张。

耶鲁公开课 - 政治哲学导论课程节选