Crab body green, the back has a big shell, looked like a warrior wearing armor, the shell of the Central Authorities have several white patterns, I have leaned one of view, looked like a face.
螃蟹全身青绿,背上有一个大大的壳,活像一个身披铠甲的武士,壳的中央有几条白色的花纹,我凑近一看,活像一张脸。
The radiated power and acoustic pressure on the shell sur face are calculated, and the influence of the layer area on the shell "s radiation is discussed."
计算了圆柱壳表面的辐射声功率和辐射声压,讨论了阻尼覆盖层面积对声辐射的影响。
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