波动 1.(不稳定) undulate; fluctuate; unsettle; surge; rise and fall 情绪波动 in an anxious state of mind; 蔬菜价格随气候波动。 the price of vegetables fluctuates according to the weather.2.[物理学] wave (motion); wave propagation; undulation; fluctuation; fluctuating; undulatory; 波动变量 wave variable; 波动电流 undulating current; fluctuating current; 波动阀 flutter valve; 波动方程 wave equation
传播 1.(广泛散布) disseminate; propagate; spread; (over); diffuse; transmit; run 传播马克思列宁主义 propagate [disseminate] marxism-leninism; 传播知识 spread knowledge; 制止病菌传播 check the spread of germs; 动植物病害传播极快。 animal and vegetable pests propagate with extreme rapidity. 疟蚊传播疟疾。 anopheles mosquitos transmit malaria. 消息象野火般迅速传播开来。 the news spread like wild-fire. 印刷术的发明有助于知识的传播。 the invention of printing helped the diffusion of learning.2.[物理学] propagation; transmission; transmitting; travel 散射传播 scatter propagation; 直线传播 rectilinear propagation
Here we discuss only two special types of wave propagation problems that have a direct bearing on both theoretical and applied seismology . 在这里我们只讨论和理论地震学及实用地震学都有直接关系的波动传播问题的两个特例。
These ripples in the space - time fabric travel toward earth , bringing with them information about their origins , as well as invaluable clues to the nature of gravity 这些时空结构中的波动传播到地球,仍携带着关于波动源头的信息,以及非常重要的关于引力本质的的线索。
Analyses results show that the materials , tension and rigidity of wires , speed of trains , wave speed , and lift forces are primary factors that affect fatigue life of contact wires 分析结果表明,接触导线线质、张力和刚度以及列车运行速度、波动传播速度和抬升力是影响导线疲劳可靠性的主要因素。
After the storm move in shandong area , the moist downdrafts appears , the mgws apart from the thunderstorm and move faster , the mgws weaken gradually because absence of wave duct and energy supply 成熟阶段的对流风暴,由于中高层潜热释放和湿下沉气流进一步加强,波动传播加快; mgws和对流风暴分离后,因无“波道”机制和波能供给,波幅逐渐减小。