我们需要的不是善意但难以实现的宣言，而是实际行动。What we need is not manifestos of pious intentions, but real action.高速公路的实际覆盖面积还不到农村地区的0.1%。Motorways actually cover less than 0.1 percent of the countryside.这两种手法实际运用起来哪个好一些？How do the two techn...
The greatest lower bound of A is also called the infimum of A.A的最大下界边称为A的下确界.Property of symmetric random variable is discussed by introducing the concept of almost supremum and infimum.讨论了具有倒对称随机变量的若干性质.Gives the infimu...