We can never just have it there before us or, as I say, if we can--if we can--it's a very, very difficult act of concentration.

我们永远不能只面对着它，或者，要我来说，如果我们可以的话，那将需要高度集中注意力，这是很难的。

耶鲁公开课 - 文学理论导论课程节选

That signal is carried here, for example, by the concentration of second messengers - the concentration of something else.

这里这个信号由,第二信使的浓度,即另一种物质的浓度来传递

耶鲁公开课 - 生物医学工程探索课程节选

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

So, this is several months and this logarithmic scale on the Y-axis represents antibody concentration.

这是在几个月内,这里使用的是对数刻度,Y轴代表的是抗体的浓度

耶鲁公开课 - 生物医学工程探索课程节选