The timing of the Doha round could not be more significant, as an economic slowdown has given rise to a new wave of protectionist sentiment.
多哈回合谈判的时机极其重要，因为经济滑坡已造成新一波保护主义情绪的抬头。
When the elasticity of seabed is small and the porosity is large, the interaction between wave and seabed is more significant.
当海床的弹性小、渗透性大时，波浪与可渗海床的这种相互作用更为明显。
The time histories of ground responses and wave motions are presented, and it was found that significant wave propagations are generated when Mach number of moving load approaches or exceeds 1.0.
通过数值计算给出了地基表面振动的动力时程和三维波动场的分布，发现当移动荷载的马赫数接近或大于1.0时地基中产生明显的波动传播现象。
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