有些国家有煤，因此他们用煤发电，但我们不会一直有煤。

Some countries have coal, and they make electricity with that, but we will not always have coal.

youdao

有些国家有煤，因此他们用煤发电，但我们不会一直有煤。

Some countries have coal, and they make electricity with that, but we will not always have coal.

youdao