He is newbie on computer他是电脑菜鸟

newbiea person who is new and has little experience in doing sth, especially in computing novice （尤指计算机方面的）新手.

newbie发音和咱们的牛B很接近,但是意思完全相反。

其它例句：

1. Why do I always stuck with the newbie on my team?
我为啥子总被队里的菜鸟骗呢？

2. Here is the newbie, teach him what to do.
这是新来的，告诉他该做什么。