adj.空闲的；空缺的；空虚的；茫然的 双语释义：adj.(形容词)未被占用的,空的 (of a room, seat, etc.) not being used or lived in(指职位)空缺的 (of a position in employment) not at present filled茫然的; 空虚的 blank; empty of thought英英释义： vacant[ 'veikənt ]adj.void of thought or knowledge"a vacant mind