英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:

vacuum    音标拼音: [v'ækjum]
n. 真空,空间,真空吸尘器
a. 真空的,产生真空的,利用真空的
vt. 用吸尘器打扫

真空,空间,真空吸尘器真空的,产生真空的,利用真空的用吸尘器打扫

vacuum
真空

vacuum
n 1: the absence of matter [synonym: {vacuum}, {vacuity}]
2: an empty area or space; "the huge desert voids"; "the
emptiness of outer space"; "without their support he'll be
ruling in a vacuum" [synonym: {void}, {vacancy}, {emptiness},
{vacuum}]
3: a region that is devoid of matter [synonym: {vacuum}, {vacuity}]
4: an electrical home appliance that cleans by suction [synonym:
{vacuum}, {vacuum cleaner}]
v 1: clean with a vacuum cleaner; "vacuum the carpets" [synonym:
{vacuum}, {vacuum-clean}, {hoover}]

Vacuum \Vac"u*um\ (v[a^]k"[-u]*[u^]m), n.; pl. E. {Vacuums}
(v[a^]k"[-u]*[u^]mz), L. {Vacua} (v[a^]k"[-u]*[.a]). [L., fr.
vacuus empty. See {Vacuous}.]
1. (Physics) A space entirely devoid of matter (called also,
by way of distinction, absolute vacuum); hence, in a more
general sense, a space, as the interior of a closed
vessel, which has been exhausted to a high or the highest
degree by an air pump or other artificial means; as, water
boils at a reduced temperature in a vacuum.
[1913 Webster]
[1913 Webster]

2. The condition of rarefaction, or reduction of pressure
below that of the atmosphere, in a vessel, as the
condenser of a steam engine, which is nearly exhausted of
air or steam, etc.; as, a vacuum of 26 inches of mercury,
or 13 pounds per square inch.
[1913 Webster]

{Vacuum brake}, a kind of continuous brake operated by
exhausting the air from some appliance under each car, and
so causing the pressure of the atmosphere to apply the
brakes.

{Vacuum pan} (Technol.), a kind of large closed metallic
retort used in sugar making for boiling down sirup. It is
so connected with an exhausting apparatus that a partial
vacuum is formed within. This allows the evaporation and
concentration to take place at a lower atmospheric
pressure and hence also at a lower temperature, which
largely obviates the danger of burning the sugar, and
shortens the process.

{Vacuum pump}. Same as {Pulsometer}, 1.

{Vacuum tube} (Phys.),
(a) a glass tube provided with platinum electrodes and
exhausted, for the passage of the electrical
discharge; a Geissler tube.
(a) any tube used in electronic devices, containing a
vacuum and used to control the flow of electrons in a
circuit, as a vacuum diode, triode, tetrode, or
pentode.

{Vacuum valve}, a safety valve opening inward to admit air to
a vessel in which the pressure is less than that of the
atmosphere, in order to prevent collapse.

{Torricellian vacuum}. See under {Torricellian}.
[1913 Webster]


Vacuum cleaner \Vac"u*um clean"er\
A machine for cleaning carpets, tapestry, upholstered work,
etc., by suction; -- sometimes called a {vacuum}.
[Webster 1913 Suppl.]

43 Moby Thesaurus words for "vacuum":
absence, absence of mind, blank, blankness, broom, brush,
brush off, clean slate, deprivation, emptiness, empty space,
empty-headedness, hollowness, inanity, jejunity, mental void,
negation, negativeness, negativity, nihility, nonbeing, nonentity,
nonexistence, nonoccurrence, nonreality, nonsubsistence, not-being,
nothing, nothingness, nullity, sweep, sweep out, sweep up,
tabula rasa, unactuality, unreality, vacancy, vacuity, vacuousness,
vacuum-clean, vapidity, void, whisk



安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Household Vacuum Cleaners - amazon. com
    Looking for Vacuums? Amazon com has a wide selection at great prices to help make your house a home
  • Vacuum Cleaners Floor Cleaners - Target
    Whether you need the convenience of a cordless vacuum, the hands-free operation of a robot vacuum, the precision of a handheld device, the deep cleaning power of a steam mop, the versatility of a hard floor cleaner, or the thoroughness of a carpet cleaner, there’s a perfect solution for every need
  • The 15 Best Vacuum Cleaners of 2025 | Reviews by Wirecutter
    We spent hundreds of hours researching and testing every type of vacuum cleaner, and we found the best ones to suit all kinds of lifestyles
  • 11 Best Vacuums of 2025 - Good Housekeeping
    Whether you're looking for budget-friendly vacuum options, lightweight models, high-tech vacuums with AI features or a simple, traditional vacuum cleaner, I've got a recommendation for you
  • Vacuum Cleaners - Walmart. com
    From small spills to big pet messes, a good vacuum cleaner can help you clean your house from top to bottom From cordless vacuums to carpet cleaners, Walmart has everything to keep your home neat and tidy What is a good vacuum for everyday use?
  • Vacuums and Floor Cleaning Devices – Best Buy
    Shop for vacuums and floor-cleaning devices at Best Buy Choose from a selection of vacuum cleaners, steam mops and more
  • Best Vacuums of 2025 - Consumer Reports
    Below are the best vacuums of each type, according to our test results For more information and choices, see our vacuum buying guide and complete vacuum ratings And if you’re curious about





中文字典-英文字典  2005-2009