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。