“合算的”造句

你要是买新高保真音响,要货比三家买最合算的.
If you're buying a new hi - fi , shop around for the best price.

我一开始就知道那是不合算的.
I knew right from the beginning that it would not pay.

从长远观点来看, 买质量好的物品还是合算的.
In the long run, it is aneconomy to buy good quality goods.