1·It also mandated that utilities purchase wind energy at a preferential price—thus guaranteeing investors a customer base.
它还要求公用事业公司以优惠价格购买风能，从而保证投资者有一个客户群。
2·This is the preferential price.
这是优惠价。
3·It's the preferential price.
这是优惠价。
4·You can get a preferential price.
您能得到优惠价。
5·It have is the preferential price.
这已经是优惠价了。
6·It is still the preferential price.
这已经是优惠价了。
7·How to get the preferential price or discount?
怎么才能享受优惠或者折扣？
8·Second, the company's preferential price level.
该公司的价格优惠程度。
9·I will give you a special preferential price offer.
我将给你们一个特别优惠报价。
10·So that we can give you one of the most preferential price.
这样我们才可以给你们一个最优惠的价格。