Remember using the comparative form of the adjective when comparing things , e . g 记住当比较不同事物时用形容词的比较级,例如
Although it may be foolhardy to compare things as complex as religions , people do 尽管把宗教看作大杂烩样的东西是不明智的,人们确实是这样看的。
A good way to come up with new ideas is to compare things that are different at the first sight 提出新观点的一个好方法就是比较那些乍看上去不同的东西。
But there is still only one value . undefined scalars contain the " undef " value . you shouldn t compare anything to undef , the way you would compare things to null in c c java 如果在c / c + + / java程序中,您可以将其他值与null比较,但在perl中却不能拿任何东西来与" undef "做比较。