The diffraction effect is the phenomenon of wave propagation into shadow region.
衍射则是电波绕射传播到遮蔽区的现象。
The seismic wave did not being affected generally in easy near surface or plains region.
这在简单的近地表结构地区或在平原地区可近似认为对地震波场不产生影响。
Second , an unchanging and record-breaking heat wave settled over the region.
其次，长期的、创纪录的热浪席卷了这一地区；
Second , an unchanging and record-breaking heat wave settled over the region.
其次，长期的、创纪录的热浪席卷了这一地区；
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