托福阅读长难句:怀孕鱼龙群
But these factors do not account for the interesting question of how there came to be such a concentration of pregnant ichthyosaurs in a particular place very close to their time of giving birth.
(Of结构作定语:of how there came to be such a concentration of pregnant ichthyosaurs…)
翻译:但这些因素并不能解释这个有趣的问题:为何在一个特定的地点会如此集中地出现即将临产的怀孕鱼龙群。
分句1: But these factors do not account for the interesting question
分句2: of how there came to be such a concentration of pregnant ichthyosaurs in a particular place very close to their time of giving birth
分句1中嵌套着分句2.
分句2是of结构作后置定语修饰说明question的内容。