经济不平等不仅是一个道德问题,也是一个经济问题。
酸的强度由其提供质子的能力来衡量,碱的强度由其接受质子的能力来衡量。
The more you know, the more you can imagine. The more you imagine, the more you can know.
"I am not afraid to be seen, I make no apologies for this is me."
绝望会加倍力量。