Renewable energies can be costly to start up and the tariffs would help with the price of production.

可再生能源的启动成本可能很高， 而关税将有助于降低生产价格。

You can buy things more cheaply if you buy a lot of them, and that will lower your price of production or manufacturing.

如果你买很多东西， 你可以买到更便宜的东西，这会降低你的生产或制造成本。