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

• In this thesis we investigate the beam propagation and amphoteric refraction in a Uniaxially anisotropic crystal.
  本文在理论上研究了单轴晶体中的光束传输和正负折射现象。
• The behaviours of fracture, fatigue and fatigue crack propagation in a cast magnesium alloy are systematically studied.
  本文系统地研究了铸造镁合金的断裂，疲劳和疲劳裂纹扩展性能。
• 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。
• 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。
• So far we have described the propagation of alternating magnetic fields.
  至此我们讨论了交变磁场的传播。
• In acoustics he studied the propagation of sound and musical consonance and dissonance.
  在声学中，他研究了声的传播和音乐的和谐与不和谐。
• 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。
• 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。
• 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。