The ex post perspective is backward looking.
“事后” 的视角乃是向后看的。
Because they are backward-looking, they only deal with spam that has already been sent.
因为他们是向后看,他们只处理垃圾邮件已经发出。
They can even have one eye looking forward and one eye looking backward !
它们甚至可以一只眼睛看前面,另一只眼睛朝后看。
They can even have one eye looking forward and one eye looking backward !
它们甚至可以一只眼睛看前面,另一只眼睛朝后看。
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