If you keep your vegetables in bags in your refrigerator, do not mix the types of vegetables inside of a single bag.

如果你将蔬菜装袋后放进冰箱，不要在同一个袋子里放不同种类的蔬菜。

In all my travels I have never, but for that once, been required by the British customs to open a single bag or to do more than state that I carried no goods liable to duty.

在我所有的旅行中，除了那一次，英国海关从未要求我打开一个袋子，或者除了声明我没有携带任何应纳税的物品外，我还需要做更多的事情。