They've bought themselves a new car.
他们给自己买了一辆新车。
She bought a small plot of land to build a house.
她买了一小块地盖房子。
My own feeling is that we should buy the cheaper one.
我个人的意见是我们应该买较便宜的那个。
We can deduce a lot from what people choose to buy.
从人们选购的东西可以作出多方面的推断。
It seems only reasonable to ask students to buy a dictionary.
要学生买一本词典，好像也没什么不合情理。