Beam



GRE TOEFL 考研

解释

GRE 红宝书

• n. ( 房屋等) 大梁;光线
• ［英］ n. ( 房屋等) 大梁;光线 ( a shaft or stream of light)
• ［记］ 分割记忆:be-am; 尤其注意GRE中常考的""大梁""一义

Webster Collegiate

I. noun

• Etymology: Middle English beem, from Old English bēam tree, beam; akin to Old High German boum tree
• Date: before 12th century
• 1.
  • a. a long piece of heavy often squared timber suitable for use in construction
  • b. a wood or metal cylinder in a loom on which the warp is wound
  • c. the part of a plow to which handles, standard, and coulter are attached
  • d. the bar of a balance from which scales hang
  • e. one of the principal horizontal supporting members (as of a building or ship) <a steel beam supporting a floor>; also boom, spar <the beam of a crane>
  • f. the extreme width of a ship at the widest part
  • g. an oscillating lever on a central axis receiving motion at one end from an engine connecting rod and transmitting it at the other
• 2.
  • a. a ray or shaft of light
  • b. a collection of nearly parallel rays (as X rays) or a stream of particles (as electrons)
  • c. a constant directional radio signal transmitted for the guidance of pilots; also the course indicated by a radio beam
• 3. the main stem of a deer's antler
• 4. the width of the buttocks

II. verb

• Date: 15th century
• transitive verb
  • 1. to emit in beams or as a beam
  • 2. to support with beams
  • 3.
    • a. to transmit especially by satellite ; broadcast
    • b. to transmit (data) electronically
    • c. to direct to a particular audience
• intransitive verb
  • 1. to send out beams of light
  • 2. to smile with joy

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