Cats are predators, as you may know if you've ever received a " gift" at your doorstep.

猫是掠食者，如果您在家门口收到过“礼物”，您可能会知道这一点。

The monthly subscription boxes include 18 sets of exciting experiments with two to three of them arriving at your doorstep every month.

每月订阅盒包含 18 组令人兴奋的实验，每月有两到三组到达您家门口。

It's so exciting to see that little red bag at your  doorstep, and open it up to find, for example, Wizard Cat Coffee from Cerberus.

看到家门口那个小红袋子，打开它发现例如来自 Cerberus 的巫师猫咖啡，真是令人兴奋。

In the US, whether you order a giant flat-screen TV or a week's worth of groceries, it's likely to show up at your doorstep via one of these: A delivery truck or van with a big, powerful engine.

在美国，无论你是订购一台巨型平板电视，还是订购一周的食品杂货，它都有可能通过以下其中一种出现在你家门口：一辆拥有强大引擎的送货卡车或货车。