通过测量光谱变化，科学家们能够确定目标分子在溶液中的浓度。

Scientists are able to determine the levels of the target molecule in solution by measuring the spectral changes.

youdao

随着人类活动增加，温室气体在大气层中的浓度超过了自然状态，过多热量被保存。

As human activity increases the concentration of these gases in the atmosphere far beyond their natural levels, much more heat is trapped.

youdao

选择性血清胺再吸收抑制剂阻滞了血清胺的再吸收，增加了其在神经突触中的浓度。

SSRIs block serotonin re-uptake, boosting its concentration in the synapse.

youdao

For example, sodium in our blood plasma is almost to the point sometimes of 100 millimol or that's very, very concentrated.

比如，钠在我们的血浆中的浓度,有时几乎达到了一百毫克分子,或者说非常非常浓。

麻省理工公开课 - 化学原理课程节选

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