更重要的是，替代性能源无法生产足够的电能完成任务。
More importantly, alternatives don't generate enough power to do the job.
替代性能源是可再生能源，即他们是用之不竭的能源。
Alternative energy sources are renewable, which means they can be used without running out.
酿酒厂也正将酿酒剩余的残渣作为生产替代性能源的原料来源，而不仅仅是供人饮用。
Breweries too are using production leftovers to serve up alternative fuel, and not just to fuel a night of debauchery.
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