例句：
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。
New cars don't come cheap.
新汽车没有便宜的。
It has the double advantage of being both easy and cheap.
它具有既方便又便宜的双重优点。
Cycling is a cheap way to get around.
骑自行车是一种省钱的旅游方式。
It'll work out cheaper to travel by bus.
算来还是乘公共汽车便宜些。