我本可以拿满分的，但是我太粗心了，犯了一个拼写错误。

I could have gained full marks, but I was too careless and made a spelling mistake.

youdao

是不是我太粗心了，救命！

BE is not I was too careless, Help!

youdao

主要是我太粗心了，碰到了很多个变量的微分就很容易搞错了。

It is mainly that I am too careless, the differential of meeting a lot of variables is very easy to get wrong.

youdao