遗憾的是，这些过滤器的“误承认”的发生率比较高 — 以至于我不时地需要手工来检查垃圾邮件文件夹中的 某些邮件。

Unfortunately, they also have a relatively high false positive rate -- enough that I need to manually examine some of the spam folders from time to time.

youdao

不用检查邮件内容，他基于合法邮件与垃圾邮件在传输流量上应有差异的理论来观察邮件在网络中的传输方式。

Instead of examining content, he looks at how messages move through networks, on the theory that the traffic flow of legitimate messages and spam should be different.

youdao

进一步的改进是更好地识别电子邮件的发送者，并且在根据常见垃圾邮件内容对其进行检查之前，帮助对电子邮件进行过滤。

A further improvement is to better identify the senders of the E-mail and to help filter the E-mail before it even gets checked for the usual spam contents.

youdao