unpopulated
/ˌʌnˈpɒpjʊleɪtɪd/adjective
1- (of a place) having no inhabitants（地方）无人居住的：
three missiles landed in unpopulated areas.
三枚导弹落在无人居住区。
1.1
- (of a printed circuit board) having no components fitted（印刷电路板）无元件的。