购买欲的英文：
desire to buy; desire to purchase

desire是什么意思：
v. 渴望，想要，请求；想与…发生性关系
n. 渴望，欲望，请求；情欲；渴望的东西，渴望的人

Let it be as you desire.
就按照你的意思办吧。

Desire was thoughtcrime.
情欲就是思想罪。

The goal was desirable.
目标是值得向往的。

buy是什么意思：
n. 所购的物品；便宜货；买卖
v. 买；获得；购得；收买；相信

Buying bonds is safer than buying stocks.
买债券比买股票风险小。

It's a good buy at that price.
这是一笔价钱合算的买卖。

That shirt was a really great buy.
这个衬衫真是便宜货。

purchase是什么意思：
v. 购买；赢得
n. 购买；紧握

purchase freedom with Blood
以血的代价赢得自由

This orchard became ours by purchase.
这个果树园被我们买下了。

such as stores requisition, purchase requisition,
像库存调拨单，购物申请单，