It 's a multipart question , so answer carefully .

有几部分的问题，要仔细答。

To demonstrate one method of sending multipart emails with php , let 's write a function to accept an email address and send a message to it with multiple parts .

为了演示一个用php发送复合电子邮件的方法，我们编写了一个函数接收一个邮件地址和发送一个复合邮件。

In 2009 , for example , the new york city police department made headlines when it spent nearly $ 1 million on typewriters , mostly so it could continue to use multipart carbon forms for processing evidence .

例如，在2009年，纽约市警察署上了头条新闻，因为他们花了近100万美元购置打字机，所以他们可以继续使用多碳的形式来处理证据。

The atp is part of a multipart signaling system that includes track circuits that detect whether there is activity on a particular stretch of track they don 't see or sense other trains ahead like radar might .

atp系统是信号系统众多组成部分之一，该信号系统包括轨道电路，它可以检测到某段轨道上是否有列车占用，而不像雷达那样可以看到或感觉到前方的其他列车。

This entry was aimed at showing the anatomy of a multipart email message , as well as demonstrating the use of the heredoc syntax to easily put headers in place .

这个项目的目的是展示多重电子邮件的细节，以及使用定界符把标题放在合适的位置。