在20世纪前期有很多太阳能水加热器在超市，但是卖的不是很好。

And around the beginning of the 20 century, there were actually some premital solar water heaters on consumer supermarket, but it didn't sell very well.

youdao

在20世纪前期有很多太阳能水加热器在超市，但是卖的不是很好。

And around the beginning of the 20 century, there were actually some premital solar water heaters on consumer supermarket, but it didn't sell very well.

youdao