获得应允是设定预期的好时机，可以保证你的用户知道他们收到你的电子邮件的频率以及条件。
Asking for permission is a great time to set expectations, ensuring your customers know how often, and under what conditions, they will receive email communications from you.
回到你在不同公司里收到的员工发来的电子邮件——有没有一封是你认为最强硬的？
Q. Back to your e-mails that the staff at various companies have sent you — was there an e-mail that you remember that was the toughest?
收到你的电子邮件我很高兴。
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