zhè / jiā / diàn / lì / gōng / sī / cǎi / yòng / jiē / tī / jì / jià / yòng / diàn / yuè / duō / dān / jià / yuè / gāo

这家电力公司采用阶梯计价，用电越多，单价越高。

This power company uses tiered pricing, with a higher unit price for greater electricity use.