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。