最后，要在提供有退款保证的商店购买。

Finally, shop at a store that offers a money-back guarantee.

youdao

你知道有一个8周，清退款保证。

You understand there is an 8 week, money-back guarantee.

youdao

我们非常自信我们的产品，我们提供一个完整的退款保证。

We are so confident in our products that we offer a full money-back guarantee.

youdao

售出商品质量不符保证退款。

Goods are sold with money-back guarantee.

《新英汉大辞典》

售出商品质量不符保证退款。

Goods are sold with money-back guarantee.

《新英汉大辞典》