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L the length of the pendulum is l, the length of the string.
摆锤的长度是，绳子的长度。
youdao
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The swing is a pendulum with a single natural frequency depending on its length.
秋千是只有一个固有频率的摆，此频率决定于它的长度。
youdao
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The swing is a pendulum with a single natural frequency depending on its length.
秋千是只有一个固有频率的摆，此频率决定于它的长度。
youdao