Examples
wèn tí问题shì是,tài yáng néng太阳能tài太guì贵le了。
问题是,太阳能太贵了。
The problem is that solar energy costs too much.
在我们看来，太阳能电池是一项很好的投资。
In our opinion, solar panels are a good investment.
自从我在我的房子上装了太阳能电池板，我的电费单就减半了。
Since I installed solar panels on my house, my energy bill has been cut in half.