We do our business by mail.

我们通过邮递做生意。

All our products are available by mail order.

我们的商品都可以邮购。

The toys are available by mail order from Opi Toys.

这些玩具可以从欧派玩具公司邮购。

It's easier to reach her by telephone than by mail or email.

打电话比写信或发电子邮件更容易联系上她。

Grey-market perfumes and toiletries are now commonly sold by mail.

灰市的香水和化妆品现在常以邮购方式售出。