It can be extremely rapid,perhaps no more than 2 seconds.
perhaps no more than 2 seconds 应该如何去理解?它是什么成份?
perhaps 修饰 no more than 对吗?然后,perhaps no more than 修饰“时间名词”。perhaps no more than 2 seconds.是一个时间名词词组吗?如果是名词词组,逗号+这个名词词组如何分析?他是修饰句子还是修饰“表语”?可以分析为同位语吗?