haven't had any archives that's been to this frequency听写voa时遇到这么一句话：Until now we haven't had any archives that's been to this frequency.翻译是：截至目前,我们没有任何存档频率如此职高的档案馆.我不能理

haven't had any archives that's been to this frequency听写voa时遇到这么一句话：Until now we haven't had any archives that's been to this frequency.翻译是：截至目前,我们没有任何存档频率如此职高的档案馆.我不能理
haven't had any archives that's been to this frequency
听写voa时遇到这么一句话：Until now we haven't had any archives that's been to this frequency.
翻译是：截至目前,我们没有任何存档频率如此职高的档案馆.我不能理解那个修饰archives的定语从句“that's been to this frequency”的语法结构,求大神相助.

haven't had any archives that's been to this frequency听写voa时遇到这么一句话：Until now we haven't had any archives that's been to this frequency.翻译是：截至目前,我们没有任何存档频率如此职高的档案馆.我不能理
that's been to this frequency的完整形式是,
that has been to this frequency.相当于:
An archive has been to this frequency.
这里的has been to 是已经达到……的意思.