The radiation efficiency of the radiation modes falls off very rapidly with the increase of modes order at low frequency.
由于在中、低频时，声辐射模态对应的辐射效率随着模态阶数的增加而迅速降低。
The radiation efficiency of the radiation modes falls off very rapidly with increasing modes order at low frequency.
研究发现在中、低频时，声辐射模态对应的辐射效率随着模态阶数的增加而迅速降低。
The radiation efficiency of the radiation modes falls off very rapidly with increasing modes order at low frequency.
研究发现在中、低频时，声辐射模态对应的辐射效率随着模态阶数的增加而迅速降低。
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