price system造句

1、I liked its price system that was simple and clear.
我喜欢他们的价格系统，简单易懂。

2、two-tier price system of the mineral products
矿产品两部制价格

3、The article gave out price system stability is critical the mensurable expression of vector.
本文给出了价格系统稳定性临界向量的定量表达式。