This paper first study function and the structure of portals, and put forward the general level frame structural model of portals.
本文首先研究了门户网站的结构和功能，提出了门户网站的通用层次框架结构模型。
More particularly, the number of sustain pulses within the video frame and selected by the power level mode is modified as a function of the input frame frequency.
更具体地，按照输入帧频率的函数来修改视频帧内的维持脉冲数。
More particularly, the number of sustain pulses within the video frame and selected by the power level mode is modified as a function of the input frame frequency.
更具体地，按照输入帧频率的函数来修改视频帧内的维持脉冲数。
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