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拼音/秒
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来自维基教科书，一个开放世界的开放图书
<
拼音
注
拼音#拼音声调标记
秒
是一种极其短的
期
间
，是一
分钟
中的 60 部分之一。
1
秒
是 1/60
分钟
的极其短暂的
期间
。
类别
:
书：拼音
华夏公益教科书
