So, imagine the pig has a heavy collar and to reward the pig for walking forward you might remove the heavy collar.
所以,想象这头猪带着很重的项圈,作为对这头猪向前走的奖励,你可以把项圈拿掉。
In other words what happens to people's health as they lose weight and then regain it repeatedly over a period time?
换言之,在一段时期内反复增重减重,对人们的健康有什么影响
And what was known about alpha particles at the time is that they were these charged particles and that they were very heavy.
当时对alpha粒子的理解,是它们是带电的而且非常重,有谁知道的,比Rutherford时代的多吗。
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