A friendly polar bear loving nothing more than an audience and climbing out of his snowy bed to give a cruise ship a wave was caught on camera by a photographer, the Daily Mail of London reported.
据英国《每日邮报》报道，一位摄影家日前在北极斯瓦尔巴德群岛拍到一只超有表现欲的好客北极熊，当一艘游艇经过它家附近时，它从雪窝中爬出来，向过往的人们挥掌执意。
Polar or linear plot for far-field or ground wave radiation pattern.
极地或辐射型线性情节的远场或地面波。
The displacement solution is constructed by applying the symmetry of scattering of SH-wave and the method of multi-polar coordinate system.
利用SH散射的对称性和多极坐标方法构造了问题的位移解。
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