英语翻译Despiteaspellpfinitialoptimisminthe1960sand1970swhenitappearedthattransistorcircuitsandmicroprocessorsmightbeabletocopytheactionofthehumanbrainbytheyear2010,researcherslatelyhavebeguntoextendthatfor

　　英语翻译

　　Despiteaspellpfinitialoptimisminthe1960sand1970swhenitappearedthattransistorcircuitsandmicroprocessorsmightbeabletocopytheactionofthehumanbrainbytheyear2010,researcherslatelyhavebeguntoextendthatforecastbydecadesifnotcenturies.

　　这是出自2002年的考研英语阅读第二篇第四段,大致是讲人工智能的,请各位英语大大不吝赐教~

　　主要是那个itappeared中的it所指代的是什么不太清楚~不过根据你的翻译大概已经搞动了结构,