procurvation

例句：

1. 1. We can pre-purchase the tickets for the concert by signing up on the website.
   我们可以通过在网站上注册来预购音乐会的票。
2. 2.The store offers a pre-purchase discount of 10% on all items.
   该商店对所有商品提供10%的预购折扣。
3. 3.Many customers prefer to pre-purchase their groceries online before heading to the store.
   许多顾客倾向于在线预购他们的杂货，然后再去商店购买。