求翻译：The response rates were 3.9 times higher than those achieved in previous mailings and were repeated successfully over many years.是什么意思？

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悬赏分：1 - 离问题结束还有

The response rates were 3.9 times higher than those achieved in previous mailings and were repeated successfully over many years.

问题补充：

匿名	2013-05-23 12:21:38 应答率分别为3.9倍，比那些在以前的邮件取得更高，经过多年的反复成功。

匿名	2013-05-23 12:23:18 的答复率是3.9倍以上这些取得成功在上次邮购和重复了多年。

匿名	2013-05-23 12:24:58 在早先邮寄那些是3.9次更加高于达到的反应速度和成功地被重覆了在许多岁月期间。

匿名	2013-05-23 12:26:38 回应率比以前的邮件在取得高 3.9 倍，多年来成功地重复。

匿名	2013-05-23 12:28:18 应答率分别为3.9倍，比那些在以前的邮件取得更高，经过多年的反复成功。

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