So, let's say that we have a long, double stranded DNA molecule, and we're interested in the highlighted part.

所以，假设有一个长的双链DNA分子，我们需要研究彩色部分标示的这段DNA。

And if the crRNA-tracrRNA complex binds to its complementary sequence near a PAM, it helps guide Cas9 to chop up the double stranded DNA of the offender like a ninja, 3 base pairs in front of the PAM.

当crRNA-tracrRNA复合体与病毒PAM附近的互补序列相结合，它将帮助介导Cas9，像忍者一样在PAM的前3对碱基处切断入侵者的双链DNA。