英语语法分析

Eighteen countries now generate electricity using geothermal heat.

现在有18个国家使用地热发电。

The contribution of geothermal energy to the world's energy future is difficult to estimate.

地热能对世界未来能源的贡献是难以估计的。

Reykjavik, the capital of Iceland, is entirely heated by geothermal energy derived from volcanic heat.

冰岛的首都雷克雅未克完全是用火山热产生的地热能来供热的。