v 用吸塵器清掃(clean using a vacuum cleaner)[I， T+n， T+n+adv(out)]：(sb) be～ing in the dining-hall(某人)正在餐廳用吸塵器打掃;～the carpet/the stairs/the floor/the room/the house用吸塵器清掃地毯/樓梯/地板/房間/房屋;～the room/the car (out)用吸塵器徹底清理房間/汽車;
n (1)真空 (space which is entirely empty of gas(es) or matter)[C]：a～flask/tube 保溫瓶/電子管; a～cleaner/pump 真空吸塵器/泵;create a perfect～創(chuàng)造一種完全真空狀態(tài);～-packed 抽出空氣密封包裝的;
(2)空虛(的感覺);與外界隔絕(的狀態(tài))(emptiness;state of isolation from outside influences)[C， 通常sing](fig)：(sb's death) leave a～in one's life(某人的死)使自己生活空虛;live/work in a～在與世隔絕的狀況下生活/工作;He was brought up in a～，isolated from the normal world. 他是在與正常世界隔絕的環(huán)境里長(zhǎng)大的。
(3)真空吸塵器(short form for vacuum cleaner)[C](infml)：～=～cleaner