| vacuum | |
| 级别 | 第5级 |
| 音标 | [ ˈvækjuəm ] |
| 解释 | n.真空，空间，真空吸尘器；adj.真空的，产生(利用)真空的；v.用吸尘器打扫 |
| 英英释义 | a machine which cleans floors and other surfaces by sucking up dust and dirt |
| 发音 |  |
| 例句 |
1. Sound waves will not travel through a vacuum. 声波在真空里不能传播。 2. He sells vacuum cleaners. 他经销真空吸尘器。 |
