PX
noun/ˌpiː ˈeks/
/ˌpiː ˈeks/
(plural PXs
/ˌpiː ˈeksɪz/
/ˌpiː ˈeksɪz/
)- post exchange(a store at a US military base that sells food, clothes and other things)
邮政交换（美国军事基地的一家商店，出售食品、衣服和其他东西） CulturePrices are cheaper than in ordinary stores because there are no taxes and the PX does not make a profit. Such a store on a US Air Force base is called a BX (Base Exchange) and on a US Navy base or ship it is called a NEX (Navy Exchange).