Can be a small system or a large grid electricity generating facility. 可以是一個(gè)小系統，也可以是一大組互連的發(fā)電設施。
The ease with which functional units may be interconnected or attached to a data communication system without modification. 功能單元互連或連接到數據通信系統而無(wú)需修改的容易程度。
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