1·Support schemes should be extended at appropriate levels to avoid having most of these large-scale biopower plants become uneconomical.
支持计划应该在适当的水平上扩展,以避免大多数这些大型生物质电厂变得不经济。
2·This is necessary because the power system component can never be designed to withstand the worst possible conditions due to the fact that this will make the whole system highly uneconomical.
这是必要的,因为电力系统组件的设计不能承受最坏的原因在于,这将使整个系统非常不经济的可能条件。