出于这个原因，hashcash必须与其他的反垃圾信息技术联合使用。

For this reason, hashcash makes most sense in combination with other anti-spam techniques.

youdao

垃圾信息散布者的行为模式有很多，所以如今的一些反垃圾信息技术都在试图利用这些模式。

There are also broader patterns across almost all spammer activities, and some anti-spam techniques try to take advantage of these patterns.

youdao

最终的后果往往是Web发布者往往要在反垃圾信息方面浪费大量资源，并会占用处理其他任务的时间。

And the final injury is that Web publishers end up wasting resources on spam-fighting, taking time way from other tasks.

youdao