有几个英语句子不是很明白 求解答

有几个英语句子不是很明白 求解答
1,Perhaps so much time has passed that there will never be satisfactory answers to the cave image. 我只知道that的用法一个是各种从句的引导词,另一个是有实际意义；在这个句子里that是起什么作用呢,是用来定语从句修饰time的么.
2, Large wind farm might also interfere with the flight patterns of migratory birds in certain areas, and they have killed large birds of prey (especially hawk, falcons, and eagles) that prefer to hunt along the same lines that are ideal for wind turbines. 在这里birds of prey该如何理解?猎物的鸟?
语法实在差,求大神知道.先谢谢了!