Assume that a certain mail volume (in GB) has to be archived per day.

假设每天要归档一定量(以gb计)的邮件。

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And it gets worse.By 2020, first-class mail volume is expected to drop by half.

2020年的情况会更糟，一类邮件数量预计将减少一半。

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Then the Internet happened.Although total mail volume stayed relatively steady until 2006, it has dropped an astonishing 20 percent in the past five years.

有了网络后，虽然2006年之前总的邮件数量维持在相对稳定的水平，但在过去的五年里邮件数量骤降20%。

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And it gets worse. By 2020, first-class mail volume is expected to drop by half.

2020年的情况会更糟，一类邮件数量预计将减少一半。

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The United States Postal Service handles over forty percent of the worlds mail volume.

美国邮政服务承担了世界上40%以上的邮件。

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Then the Internet happened. Although total mail volume stayed relatively steady until 2006, it has dropped an astonishing 20 percent in the past five years.

有了网络后，虽然2006年之前总的邮件数量维持在相对稳定的水平，但在过去的五年里邮件数量骤降20%。

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Then the Internet happened. Although total mail volume stayed relatively steady until 2006, it has dropped an astonishing 20 percent in the past five years.

有了网络后，虽然2006年之前总的邮件数量维持在相对稳定的水平，但在过去的五年里邮件数量骤降20%。

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