... Bidirectional双向性的 Cardioids心形 CondenserMicrophone电容式传声器电容麦克风 ...
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cardioids diagram 心形曲线图
cardioids microphone 心形方向性话筒
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以上来源于: WordNet
N a heart-shaped curve generated by a fixed point on a circle as it rolls around another fixed circle of equal radius, a. Equation: r = a(1 – cos φ), where r is the radius vector and φ is the polar angle 心脏形曲线
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