We're doing an important test at Amazon.com that we wanted you to
know about. It may be the most important experiment we've done to
date.
我們正在做一個重要測試 希望您知道

Starting today, as a long-term test, you can get Free Super Saver
Shipping on orders over $49. Previously, only orders over $99
qualified.
有關免運費的訂單 從前為99元以上 現在改為49元即可免運費