Try this as an experiment: smile at someone as you pass them on the street or walking around the office.

试着做下面这个试验：在街上或办公室对与你擦肩而过的人微笑。

youdao

And because no human life should be started or ended as the object of an experiment, I ask you to set a high standard for humanity and pass a law against all human cloning.

CNN: Transcript of State of the Union