And so, they would come in and you would do -- Anybody that was going to show an experiment, which was kind of a new word at the time, demonstrate some principle, they had to do it on stage, where everybody could see it.
而且，来的人都要 — 每个进来的人都得展示一个科学实验， 科学实验当时还是个新名词， 得说明一些原理性的东西。 人们得上一个讲台，大家都看得见的，