vacuum background

vacuum

/ˈvæ.kjuː.əm/

Illustration vacuum - Image 1

noun

真空，虚空。

A region of space that contains no matter.

Examples :

"The scientist studied the vacuum in space to understand how stars form. "

科学家研究太空中的真空，以了解恒星是如何形成的。

space physics astronomy science

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noun

吸尘器，真空吸尘器

(plural only "vacuums") A vacuum cleaner.

Examples :

"My mother uses the vacuum to clean the living room floor every week. "

我妈妈每周都用吸尘器打扫客厅的地板。

utility device machine

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noun

真空，虚空。

The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, such as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.

Examples :

"a vacuum of 26 inches of mercury, or 13 pounds per square inch"

真空度为26英寸汞柱，也就是每平方英寸13磅的压力。

physics condition science technology

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noun

真空

A spacetime having tensors of zero magnitude

Examples :

"The vacuum of space allows satellites to travel freely without air resistance. "

空间的真空状态使得卫星能够不受空气阻力自由运行。

physics space theory

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verb

用吸尘器打扫，吸尘。

To clean (something) with a vacuum cleaner.

Examples :

"Before the party, I vacuumed the living room rug to remove the dust. "

派对前，我用吸尘器把客厅的地毯吸了一遍，把灰尘都吸掉了。

utility technology machine device work action

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verb

用吸尘器清扫，吸尘。

To use a vacuum cleaner.

Examples :

"My mom vacuumed the living room before the guests arrived. "

我妈妈在客人来之前用吸尘器把客厅吸了一遍。

utility technology machine device

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verb

清理，优化

To optimise a database or database table by physically removing deleted tuples.

Examples :

"The database administrator vacuumed the student records table to improve its performance. "

数据库管理员清理并优化了学生记录表，以提高其性能.

computing technology