解析
during the Second World War介词短语做状语;when several governments came to the conclusion that the specific demands that a government wants to make of its scientific establishment cannot generally be foreseen in detail 做定语修饰the Second World War ;that the specific demands cannot generally be foreseen in detail同位语从句修饰conclusion ;that a government wants to make of its scientific establishment修饰demands。
(4)本句的参考译文
这种趋势始于第二次世界大战期间,当时一些国家的政府得出结论:政府向科研机构提出的要求通常是无法详尽预见的。
总之,只要考生对句子结构有个透彻的理解,弄清句子的各个成分,并可以借助连词、介词、非谓语动词等手段把句子由简单变得复杂,由复杂变得简单,这样句子结构分析技能提高了,长难句也就攻克了,对于考研阅读和翻译的理解也就简单了。