可持续性不是成本,而是对我们未来的投资。
每一个超限的一致多重性,即每一个超限集合,必须有一个确定的阿列夫作为其基数。
Life has taught me to think,but thinking has not taught me to live.
The more you look, the less you see.
The best way to predict the future is to invent it.