As you walk amid the buildings and trees, as you see your friends and classmates, allow these emotions to float through you, freely, lightly.

在你走在建筑物和树木之间时，在你看到朋友和同学时，让那些情绪流遍你的全身，自由地，轻盈地。

哈佛公开课 - 幸福课课程节选

As it does that it changes the volume of the heart and gives the - creates the pressure that moves blood around your body, so it has that muscular system.

这使心脏的体积发生变化,产生了足以使血液流遍全身的压力,这就是心脏中有肌肉系统的原因

耶鲁公开课 - 生物医学工程探索课程节选

The cell that's producing the signal produces enough of the molecule so that it enters the bloodstream, it circulates throughout your body, eventually it reaches a cell at a great distance, which has a receptor for that ligand and the signal gets received.

发出信号的细胞产生信号分子,数量十分充足 能够进入到血液中,信号随着血液流遍全身,最终到达较远处的细胞,在这些细胞上有与配体配对的受体,信号被细胞接收

耶鲁公开课 - 生物医学工程探索课程节选