生命中最美好的东西都是免费的。显然,我们最宝贵的资源是时间。
My favorite things in life don't cost any money. It's really clear that the most precious resource we all have is time.
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。