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单词 beam
释义
beam
noun[C]
uk
/biːm/us
/biːm/

beamnoun[C](LINE)

B2
alineoflightthatshinesfrom abrightobject:
光线；光束；光柱
We could justpickout thetrailin theweakbeam of theflashlight.我们借着手电筒微弱的光仅能勉强认清路。
Therabbitstopped,mesmerizedby the beamofthe car'sheadlights.兔子被汽车前灯射出的光束迷住了眼，停了下来。
See also
moonbeam
sunbeam
picture of beam
Evgeniy Kirillov/EyeEm/GettyImages
alineofradiationorparticlesflowingin onedirection:
（定向发出的）射束，粒子流
alaserbeam激光束
anelectronbeam电子波
SMART Vocabulary: related words and phrases
Quantities & units of light
  • anti-glare
  • aureole
  • blip
  • brightness
  • glare
  • gleam
  • glimmer
  • glint
  • glitter
  • glow
  • halo
  • multiphoton
  • pencil
  • photon
  • radiance
  • ray
  • shaft
  • sheen
  • shimmer
  • shine
See more results »

You can also find related words, phrases, and synonyms in the topics:

Light
Physics: atoms, molecules & sub-atomic particles

beamnoun[C](WOOD)

along,thickpieceofwood,metal, orconcrete,especiallyused tosupportweightin abuildingor otherstructure:
（尤指支撑建筑物或其他结构的）梁，桁架，栋梁
Thesittingroomhadexposedwoodenbeams.客厅顶上有裸露的木梁。
picture of beam
doomu/iStock/Getty Images Plus/GettyImages
the beam
in thesportof women'sgymnastics, awoodenbaron which thecompetitorsbalanceandperformmovements
（女子体操运动中的）平衡木
picture of beam
John M Lund Photography Inc/DigitalVision/GettyImages
SMART Vocabulary: related words and phrases
Parts of buildings: arches, columns & beams
  • abacus
  • abutment
  • arch
  • architrave
  • archway
  • colonnade
  • column
  • Corinthian
  • Doric
  • ionic
  • joist
  • keystone
  • pillar
  • plinth
  • portico
  • soffit
  • torus
  • truss
  • vault
  • vaulting
See more results »

You can also find related words, phrases, and synonyms in the topics:

Gymnastics

Idiom

be on your beam ends
beam
verb
uk
/biːm/us
/biːm/

beamverb(SMILE)

[I]
tosmilewithobviouspleasure:
高兴的微笑，眉开眼笑
She beamedwithdelight/pleasureat hisremarks.听完他的话她高兴得眉开眼笑。
Thechildbeamedathisteacheras hereceivedtheaward.那个孩子在领奖时对他的老师报以微笑。
[+ speech]"I'm sopleasedtoseeyou," he beamed(= said as hesmiled).“见到你很高兴，”他微笑着说。
SMART Vocabulary: related words and phrases
Laughing and smiling
  • amused
  • be all smilesidiom
  • be in convulsionsidiom
  • be rolling in the aislesidiom
  • be wreathed in smilesidiom
  • bust
  • dissolve
  • gale
  • gales of laughteridiom
  • giggle
  • giggler
  • giggly
  • grin
  • quake
  • rictus
  • say cheeseidiom
  • simper
  • smile
  • smiling
  • stitch
See more results »

beamverb(SEND OUT)

[IorT]
tosendout a beam oflight, anelectricalorradiosignal, etc.:
辐射；发光；闪光；发射电波；播送
Thesunbeamed(=shonebrightly)down ontheboatas itdriftedalong.阳光照在缓缓漂动的船上。
Theconcertwas beamed(=broadcast)bysatelliteall over theworld.音乐会经卫星播送到世界各地。
SMART Vocabulary: related words and phrases
Giving out light
  • afire
  • albedo
  • bioluminescence
  • burnished
  • candlelit
  • flicker
  • gleam
  • glimmer
  • glitter
  • glow
  • illuminate
  • noctilucent
  • non-glare
  • non-luminous
  • out-glitter
  • pearlescence
  • reflected ray
  • shine
  • spotlight
  • wink
See more results »
(Definition ofbeamfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)

beam| American Dictionary

beam
noun[C]
us
/bim/

beamnoun[C](LIGHT)

alineoflightcoming from thesunor abrightlight,esp. asseenagainst adarkerbackground:
a beam ofsunlight
Alaserbeamscansthe disc’ssurface.

beamnoun[C](WOOD)

along,thickpieceofwood,metal, orconcrete,esp. one used tosupportweightin abuildingor otherstructure
beam
verb
us
/bim/

beamverb(SEND LIGHT)

[I/T]
tosendout alineoflight:
[I]Thesunbeamed down on theballfield.
[T]Detroitstationsare beamed(=broadcast)toCanadiancommunities.

beamverb(SMILE)

[I]
tosmilewithobviouspleasure:
Hisfacebeamed as if he’dwonagoldmedalat theOlympics.
(Definition ofbeamfrom theCambridge Academic Content Dictionary© Cambridge University Press)

Examplesofbeam

beam
Proposed double-layer target for the generation of high-quality laser-accelerated ion beams.
From theCambridge English Corpus
Penetration of intense charged particle beams in the outer layers of precompressed thermonuclear fuels.
From theCambridge English Corpus
Interaction between neighboring beams in heavy ion fusion reactor chamber.
From theCambridge English Corpus
Generation of quasimonoenergetic electron beams using ultrashort and ultraintense laser pulses.
From theCambridge English Corpus
Laser-driven generation of high-current ion beams using skin-layer ponderomotive acceleration.
From theCambridge English Corpus
Equation-of-state properties of high-energy-density matter using intense heavy ion beams with an annular focal spot.
From theCambridge English Corpus
620 parallel beams in a fusion driver is expected to be of the order of 100.
From theCambridge English Corpus
The approach that has been explored in the past would use a single aper ture for each of the 100 beams of the injector.
From theCambridge English Corpus
Different applications require different optimizations of the proton beams.
From theCambridge English Corpus
We show it is possible to minimize the rms deviation of the intensity by repointing the beams and an optimum is found.
From theCambridge English Corpus
The displacement is supposed to be the same in magnitude for all beams of one cone and to be the same for the symmetric cone.
From theCambridge English Corpus
Demonstration of fusion-evaporation and direct-interaction nuclear reactions using high-intensity laserplasma-accelerated ion beams.
From theCambridge English Corpus
3 ability to describe forward scattering instabilities, not only for mono-energetic photon beams, but also for laser beams with an arbitrary spectral width.
From theCambridge English Corpus
Equation ofstate proper ties of high-energydensity matter using intense heavy ion beams with an annular focal spot.
From theCambridge English Corpus
Excitation of plasma wave by two laser beams.
From theCambridge English Corpus
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

Collocationswithbeam

beam

These are words often used in combination withbeam.

Click on a collocation to see more examples of it.

beam axis
A cusp magnetic field has been installed to improve radial confinement and reduce the field strength on the beam axis.
From theCambridge English Corpus
beam current
The plasma helps propagation of a highbeamcurrentwithout divergence.
From theCambridge English Corpus
beam deflection
In addition to the framing pictures, the channel stability was investigated using the ionbeamdeflection.
From theCambridge English Corpus
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/beam##
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更新时间：2024/12/28 1:08:55