这段英文这么写有什么语法错误?

题目

这段英文这么写有什么语法错误?
These manuals are very important for our customers,but sometimes these documents which translated by Chinese probably exist some problems,please help to confirm abd let me know how to revise.

答案

额,语法错误比较多.我帮你重新写算了（尽量不改变单词）These manuals are very important to our customers, but sometimes a few of problems probably exist in these documents which are translated into Chine...