我们现在的信件都是一方寄给另一方,而且,要求投递的时间越短越好的信件,而“随意”信件却是不一定要求信件寄给另一方,而且,也未必要求投递时间越短越好的信件。“随意”信件可能是自己邮寄给自己的信件,也可能是要求半年后再寄给恋人的信件,甚或可能是已故的长辈故去后又分时间分次数寄给子女的信件,它要求的是特定的投递时间。人们在不同的年龄和不同的生活环境中思想和对生活事业等的看法都会有所不同,甚至会有极大的反差, Our present mail is sent by one party to the other party, and the shorter the letter is, the shorter the better. The “free” letter does not necessarily require the mail to be sent to the other party, and it may not necessarily require a shorter delivery time The better letters. “Free” letters may be letters they mail to themselves or they may be letters sent to lovers six months later, or they may be sent to children by late deceased elders Specific delivery time. People in different ages and different living environment, thinking and life and other views will be different, and even have a great contrast,