在世界许多地方，可再生能源已经是一种主要的能源来源。
In many parts of the world renewable energy is already a principal energy source.
中国已成为世界最大的可再生能源生产国。
China is already the world's largest producer of renewable energy.
在同一时间内，中国已成为世界领先的可再生能源。
At the same time, China has become the world leader in renewable energy.
话多的青少年可能成为世界新一代可再生能源。
Chatty teenagers could be the world's next renewable energy source.
世界最大的可再生能源是什么？它们在什么地方？
What are the world's biggest sources of renewable energy and where are they located?
水电是世界上最大的可再生能源。
Hydropower is the world's largest source of renewable energy.
水电是世界上最大的可再生能源。
Hydropower is the world's largest source of renewable energy.
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