Most electronic tubes are vacuums.
多数电子管是真空的。
Modern families use vacuums to clean their houses.
现代家庭用吸尘器清洁房间。
As we all know, vacuums do not exist in human thought.
我们都知道，真空不存在人类思维。
They can survive in vacuums and at very low temperatures.
它能够在真空和低温下生存。
Which vacuums up the world's communications for analysis.
吸收世界上的交流信息来进行分析。
Which vacuums up the world's communications for analysis.
吸收世界上的交流信息来进行分析。
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