当把声波打击在声透镜一端的球体上时，声波就会转换成称为孤波的某种类型的冲击波。
When a sound wave strikes the spheres at one end of the acoustic lens, the sound gets converted into a type of shock wave known as a solitary wave.
文中比较了吸波球体的两种涂覆方法：液体涂覆法和直接涂覆法。
The methods of fluid coating and direct coating were compared in this paper.
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