Returns the ratio of the current playback position to the total recording length.
返回当前播放位置与总记录长度的比例。
For example, metadata about a recorded song might include information about its artist, album, composer, length, or quality, whereas the data is the audio recording itself.
例如，关于所录制的歌曲的元数据可能包括关于演唱者、专辑、作曲、长度或质量的信息，而数据则是音频记录本身。
Raster image formats store the picture as a bitmap describing the state of pixels, as opposed to recording the length and locations of primitives such as lines and curves.
光栅图像格式将图片存储为描述像素状态的位图，而不是记录图元（譬如，线和曲线）的长度和位置。
First, all cases were treated by endodontical therapy, recording the length of root.
患者首先接受完善根管治疗，记录根管治疗长度；
The original audio recording playback machine was at least the length of a football field.
原来的录音播放机是在至少一个足球场的长度。
Therefore the length of time can be used as a segment address, through the time-parallel single-chip timer to the address above mapping information in order to get the start address of each recording.
因此可以利用该时间长度作为一个段地址，通过单片机定时器的计时平行地映射信息段的地址，从而得到每段录音的起始地址。
The calculation showed that the wave length used as recording light in nonvolatile holographic storage is located in the range of high absorptivity.
计算结果与双色全息存储(双光子全息存储)所用记录光的波长相符。
The calculation showed that the wave length used as recording light in nonvolatile holographic storage is located in the range of high absorptivity.
计算结果与双色全息存储(双光子全息存储)所用记录光的波长相符。
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