先买

[xiān mǎi]

• preempt
• preemption

例句

1. 欠帐，赊帐；一种顾客与商店的商定，按此商定顾客可先买东西后交钱，一般于月底交。
   In a shop arrangement which a customer have with the shop to buy goods and pay for them at a later date(usually the end of the month).