While you don't want to bottle up your feelings until you gopostal one day, you don't have to approach everything negatively.
如果你不想控制你的情绪，终有一天你会失去控制，你不需要负面地对待每件事。
2
As postal rates go up, many businesses have been turning to telemarketing as a way of contacting new customers.
随着邮资上涨，许多企业已经转而将电话营销作为一种联系新顾客的方法。
《柯林斯英汉双解大词典》
3
Just as with the postal system, I find it fascinating how the whole society works, that people go to work, pay their bills and go on vacation when they should.