But just as with postal mail, not every package that arrives at your computer is one you want to open.
但是，与邮局的邮件一样，到达你的计算机上的每个包不一定就是你要打开的包。
2
The postal enterprises engaged in letters, package, and other business to obtain the postal regulatory approval.
非邮政企业从事信件、包裹等业务，需要取得邮政监管机构的许可。
3
They told me yesterday that they have no control over the postal situation in China, so they have to wait for a response from them as to the status of the package.