buy的中文意思是購買，指通過支付貨幣或其他交換手段來獲得某種商品或服務。

用法：

buy作為動詞，常用于表示購買某物的行為。它可以與介詞from和for搭配使用，表示從哪里購買或為了什么目的購買。此外，buy也可以作為名詞使用，表示已經購買的物品。

例句1-5句且中英對照：

1. I want to buy a new phone. 我想要買一部新手機。

2. She bought a book from the bookstore. 她從書店買了一本書。

3. He bought flowers for his girlfriend on Valentine's Day. 情人節那天他給女朋友買了花。

4. They are planning to buy a house in the suburbs. 他們打算在郊區買一棟房子。

5. The price of this car is too high, I can't afford to buy it. 這輛車的價格太高了，我買不起。

同義詞及用法：

1. purchase：與buy含義相同，但更正式。：I purchased a new lap yesterday.

2. acquire：指通過努力或交易獲得某物。：He acquired a large fortune through hard work.

3. obtain：指通過努力或請求獲得某物。：I obtained permission from my boss to take a day off.

4. procure：指通過努力或交易獲得某物，強調經過一番努力后才得到。：He managed to procure a rare painting for his collection.

5. get：指獲得某物，可以是通過購買、索取或其他手段。：I got a great deal on this dress.