vacuum

名词 vacuum:

1. the absence of matter
   同义词：vacuity
2. an empty area or space
   同义词：void, vacancy, emptiness
3. a region that is devoid of matter
   同义词：vacuity
4. an electrical home appliance that cleans by suction
   同义词：vacuum cleaner

动词 vacuum:

1. clean with a vacuum cleaner
   同义词：vacuum-clean, hoover

1. An empty space; a vacuum.
   真空空间; 真空
2. Some pumps and all vacuum cleaners work by suction.
   有些泵和所有真空吸尘器都是借吸力工作的。
3. His wife's death left him a vacuum in his life.
   他妻子的去世使他的生活变得空虚。