例句：
The curtains were an impulse buy.
這窗簾是一時心血來潮買下的。
We need to buy some new furniture.
我們需要買一些新家具。
Now is a good time to buy a house.
現在買房子正是時候。
They only buy the best.
他們只買最好的。
Try the shoes on before you buy them.
鞋子要先穿上試一試再買。
It may be necessary to buy a new one.
也許有必要買個新的了。