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。
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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