船在港口是安全的，但那不是船被建造的目的。
A ship in port is safe, but that's not what ships are built for.
领导力意味着今天做出艰难的决定，明天让所有人受益。
You can never know anyone as completely as you want.
Success is relative: It is what we can make of the mess we have made of things.
The path to gender equality is paved with both progress and persistent challenges.
煤炭不仅仅是一种商品，它是对美国未来的承诺。