Absence of the linear gate pulse indicates that the input pulse to be processed dose not meet the requirements that are set up by the lower and upper level control and/or no pulse is present at the input.
参考答案:
要点:英语中有些词语和短语不和否定词连用,而是通过本身的词汇意义或引申意义表现出否定意味,如本句的absence就表示否定,这种结构被成为词语否定结构。此外,本句含有一个定语从句,由关系代词that引导,修饰requirements。
译文:若没有线性门脉冲产生,则说明进行处理的输入脉冲不符合低电平和高电平控制要求的条件,或者在输入端根本没有脉冲。
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