1 sentence

1. 在您购买一双鞋之前，您需要知道您穿鞋的尺码。

   zài nín gòu​mǎi yī shuāng xié zhī​qián, nín xū​yào zhī​dao nín chuān xié de chǐ​mǎ.

   Before you buy a pair of shoes, you need to know your shoe size.

   Source: CCMatrix