Contributing to the file size, in order of importance, are the parameters that set the video bit rate, audio sample frequency, audio bit rate, then frame size.
对文件大小的贡献，按重要性的顺序，依次是视频比特率、音频采样频率、音频比特率，然后是帧速。
The audio sample frequency and audio bit rate for Flash are less than the default value of 44100 Hz while those for Windows Media Player and QuickTime are higher than the default value.
Flash的音频采样频率和音频比特率均低于默认的44100 Hz，而Windows Media Player和QuickTime的则高于默认值。
Though examples of common signal and sine signal, by the frequency spectrum graph and theoretical analysis, the minimum sample rate of the sampling theorem is made clear.
以一般信号和正弦信号为例，通过理论分析和频谱图示意，对抽样定理中最低抽样率的取值进行了明确的说明。
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