It encodes the data in such a way that the mail transport agent is unlikely to modify the resulting octets.
这种对数据的编码方式使邮件传输代理不可能修改结果八位元。
For example, if you're packaging a mail user agent or mail transport agent, there are some specific considerations that apply.
例如，如果您正在对一个邮件用户代理程序或邮件传输代理程序进行打包，那么有些特定的考虑事项适用于这种情形。
Acting as an agent of international and domestic air transport of express mail, package and goods.
代办国际、国内快件及货物的航空运输业务。
Acting as an agent of international and domestic air transport of express mail, package and goods.
代办国际、国内快件及货物的航空运输业务。
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