propagation

英 [ˌprɒpə'ɡeɪʃ(ə)n]

美

n.  传播; 扩展; 宣传; 培养

复数：propagations　

CET6GRE医学

BNC.12741 / COCA.15569

柯林斯词典

• VERB 宣传；传播；使普及
  If peoplepropagatean idea or piece of information, they spread it and try to make people believe it or support it.
  1. They propagated political doctrines which promised to tear apart the fabric of British society.
     他们鼓吹能颠覆英国社会结构的政治学说。
• VERB 繁殖，培植（植物）
  If youpropagateplants, you grow more of them from the original ones.
  1. The easiest way to propagate a vine is to take hardwood cuttings...
     栽培葡萄最简便的方法就是硬条扦插。
  2. The pasque flower can be propagated from seed.
     欧白头翁可以通过种子进行繁殖。

英英释义

noun

• the act of producing offspring or multiplying by such production
  Synonym:generationmultiplication
• the spreading of something (a belief or practice) into new regions
  Synonym:extension
• the movement of a wave through a medium

双语例句

• The sound propagation in duct with non-locally reacting liner is discussed in this paper.
  本文对声波在空腔非局域反应声衬管道内的传播进行了研究。
• The propagation of stress waves in solids can be considered as a part of the field of acoustics or ultrasonics depending on the conditions.
  应力波在固体中的传播，根据其条件可视为声场或超声场的一部分。
• This is formed by the cracks oscillating about the centerline in the direction of crack propagation.
  这是由于在裂纹的传播过程中，裂纹尖端沿着传播方向的中线上下振荡所形成的。
• The relation between the chirp in phase of soliton pulse and soliton propagation is discussed in this paper.
  讨论了光孤子传输中，由脉冲包络的相位变化产生的啁啾与孤子传输的关系。
• With kernel medium model, sound propagation characteristic in grain is studied.
  从颗粒介质模型出发，对粮食中声传播性质进行了研究。
• If a plant has spotted or crinkled leaves, do not use it for propagation.
  如果植物的叶子有斑点或者萎缩，就不要用来繁殖。
• He discussed the propagation of waves through the earth's interior.
  他探讨了地震波在地球内部的传播。
• We consider the propagation of the interface phonons in the active core of a quantum cascade laser.
  研究了量子级联激光器有源核中界面声子的色散关系和静电势分布。
• Like light waves, acoustic ( sound) waves are characterized by a frequency, wavelength and propagation speed.
  声波就和光波一样，是以频率、波长和传播速度为其特徵。
• Optical effects in intersectional silicon waveguide switch are investigated by using beam propagation method.
  运用光束传播法对硅交叉波导全内反射光开关中的光学效应进行了详细分析。