例句：

　　The curtains were an impulse buy.

　　這窗簾是一時(shí)心血來(lái)潮買(mǎi)下的。

　　We need to buy some new furniture.

　　我們需要買(mǎi)一些新家具。

　　Now is a good time to buy a house.

　　現(xiàn)在買(mǎi)房子正是時(shí)候。

　　They only buy the best.

　　他們只買(mǎi)最好的。

　　Try the shoes on before you buy them.

　　鞋子要先穿上試一試再買(mǎi)。

　　It may be necessary to buy a new one.

　　也許有必要買(mǎi)個(gè)新的了。