Three frames difference algorithm 对称差分法
three-axis frames 三轴环架
the three concentric frames 三个同心圆结构
A single web page shows all relevant information in three frames.
一个Web页面分三个框架显示所有相关信息。
This sequence of three frames of the same fish shows how it can change from largely silver to striped to solid orange-red, a transformation that occurs in a matter of seconds.
这条鱼的连续三张照片显示出它如何从几乎通体银色变成条纹、再变成纯橘红色，这转变全发生在几秒钟之内。
The prototype is divided into three frames.
这个原型分为三个框架。
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