Pennies don’t fall from heaven, they have to be earned here on Earth.
钱不会从天上掉下来，必须脚踏实地去挣。
Every experiment is a conversation with nature, and sometimes nature whispers its secrets.
永远不要停止学习，因为世界从未停止变化。
"Experience is simply the name we give our mistakes."
The only thing necessary for the triumph of evil is for good men to do nothing.