但是，如果目标是精确的重放声音的话，一个扬声器必须是声学上的点声源(单极点，全向响应)，或者是一个声学上小的双向源(偶极)。
But if the goal is to reproduce sounds accurately, then a speaker must be either an acoustic point source (monopole, omni-directional) or an acoustically small bi-directional source (dipole).
中央的假设是不列在项目分配的极点，和南北两极的性质是混合的，然后我会计划不说是或没有衣服。
The central hypothesis is not listed in the project distribution poles, and the nature of the north and south poles were mixed, then I will plan not to say yes or no clothes.
然后以重心为极点，对边缘点极坐标化，形成幅角-极径曲线，在该曲线上寻找局部极大极小值点。
Third, argument-polar radius curve of polar coordinate system whose pole is geometric gravity is formed, and maximum and minimum value points are searched.
最后根据焦点的“位迁”，在导出极点与极线式的基础上，阐述了各型镜面天线口径场的独有待色及其成因。
Lasty, according to the focus displacement, and on the basis of pole and polar line formula had been derived, expounded the on...
为了帮助它连接到了极点，我们用竹桩，也绑在转体的关系极。
To help it attach to the pole, we used bamboo stakes and also tied to the pole with twist ties.
这项专利还包括用于调节电流的应用，系统每个两极，因为它是公认的形状和张力两个极点电流不相等的。
The patent also covers systems for regulating currents, applied to each of the poles because it is recognized that the shape and tension of the currents of the two poles are not equivalent.
这项专利还包括用于调节电流的应用，系统每个两极，因为它是公认的形状和张力两个极点电流不相等的。
The patent also covers systems for regulating currents, applied to each of the poles because it is recognized that the shape and tension of the currents of the two poles are not equivalent.
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