Its subject(to use Maynard Mack’s categories) is "life-as-spectacle", for readers, diverted by its various incidents , observe its hero Odysseus primarily from without ; the tragic Iliad ,however, presents "life-as-experience": readers are asked to identify with the mind of Achilles,whose motivations render him a not particularly likable hero..
解析:主句比较简单,而后面跟着的由 and 连接的两个表示让步的条件状语从句就相对复杂,第一个从句是用一个修饰主语的定语从句 that equip those plants to enter into a symbiosis with nitrogen fixers 把主谓隔开;第二个从句则运用了插入语 once they are found 把主谓隔开。