举个例子:After more than a century of investigation, the relation of these and other phenomena, known collectively as the solar-activity cycle,to terrestrial weather and climate remains unclear.大家可以试着先顺序读原句,看看能读懂多少,然后找出主干,有重点的读这个句子,看看是不是会比刚才理解的更多:After more than a century of investigation, the relation of these and other phenomena, known collectively as the solar-activity cycle, to terrestrial weather and climate remains unclear.以寻找句子主干为目的来读句子,可以突出了重点和层次,对句子领会起来就更容易些。