I do not know whether you realize it, but this condition is essential to us.
我不知道你是否了解,但是,这个条件对我们是必要的。
But the first people who were like ourselves lived so long ago that even their sagas, if they had any, are forgotten.
但是,和我们相似的原始人生活的年代太久远了,因此,有关他们的传说既使有如今也失传了。