In this case, some of them become neuroblasts, and eventually the nerve fibers of the plexuses in the gut.

在这种情况下，其中一些变成了神经母细胞，最终成为肠神经丛的神经纤维。

A disruption of that neuroblast journey in that time window, means that nerve fibers don't develop in the rectum and parts of the colon.

（假如那时）神经母细胞的旅程被中断，意味着神经纤维不能在直肠和部分结肠中形成。

Around week 8 of development the neuroblasts get to the proximal colon of the gut, and then they pass through the distal colon, and around week 12 they finally the reach the rectum.

在胚胎发育的第8周左右，神经母细胞到达肠道的结肠近端，之后穿过结肠远端； 在第12周左右到达直肠。