榛睡鼠是一种在夜间活动的胆小动物。

The dormouse is a shy, nocturnal creature.

《牛津词典》

有一种在蔓延的危险感。

There is a pervading sense of menace.

《柯林斯英汉双解大词典》

他一直都想要一种在热带丛林里的冒险生活。

He had always wanted an adventurous life in the tropics.

《柯林斯英汉双解大词典》

But in general, for each neurotransmitter that released it there would only be one population of receptors that's ready to receive it.

但总体说,每一种在此释放的神经递质,只能被一类受体接受

耶鲁公开课 - 生物医学工程探索课程节选

Reason, science, art is the capacity to transform nature by making it, imposing on it, a method that will produce like effects after similar consequences.

理性，科学，艺术是一种能力,是通过创造，施加影响力改变自然的能力，是一种在类似的结果发生后,产生类似结果的能力。

耶鲁公开课 - 政治哲学导论课程节选

So, this is the kind of immune response that gets activated only when it's needed.

所以 这是一种在需要时,被激活的免疫反应

耶鲁公开课 - 生物医学工程探索课程节选