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来源:雅诚德英语网
The length of the bar is about 122 centimeters, and so that translates into a frequency of roughly 2,200, 2,100 hertz.
条的长度大概是,122厘米,转换成频率就是,大概2200,2100赫兹。
The length of the bar is about 122 centimeters, and so that translates into a frequency of roughly 2,200, 2,100 hertz.
条的长度大概是,122厘米,转换成频率就是,大概2200,2100赫兹。