下单

wǒ yīng gāi zěn me xià dān

我应该怎么下单？

How can I order this?

wǒ de shū yǐ jīng xià dān le

我的书已经下单了。

My book is on order.

tí qián xià dān jiù hěn hǎo

提前下单就很好。

It is a good idea to place your order well in advance.

xià dān dìng huò

下单订货

place orders

zài xiàn xià dān

在线下单

order online