What alternative energy resources can be developed?
能开发出什么样的替代能源呢？
What alternative energy resources can be developed?
能开发初什么样的替代能源呢？
I'll focus... let's continue our discussion of alternative energy resources.
让我们继续可替代能源的话题。
I'll focus... let's continue our discussion of alternative energy resources.
让我们继续可替代能源的话题。
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