随后我们将邮件的实际发送移动到循环体外面，而在循环体中构建一个要添加到消息体的文本字符串。

You then move the actual sending of the mail outside this loop, instead building a string of text to add to the body of the message.

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例如，假设希望把一个包含 ASCII 文本文件的电子邮件发送给另一个用户。

For example, say you want to send an e-mail of an ASCII text file to another user.

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与朋友保持联系：每天我设法发送快速电子邮件或文本给朋友。

Ping a friend: I try to send a quick email or text to a friend each day.

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