我一直很纳闷：这些性侵案件，又事隔多年，怎么证明被告人性侵了原告？就是被告找了几个或者十几个人一起说原告性侵了被告就罪名成立吗？还是原告保留了录音或者录像什么的证据？
I have always wondered: how can it be proved that the defendant sexually assaulted the plaintiff after years of sexual assault? Is it that the defendant brought together several or more people to say that the defendant was guilty of sexual assault? Or has the plaintiff retained audio or video evidence?