On the math it is a line integral of something dx plus something dy.

从数学意义上来说，这是dx部分加上dy部分的线积分。

youdao

I guess that was a minus sign, of m of minus m of dx.

我猜那是个负号，对M - M。

youdao

If this is only a test question, your dx?

如果仅是一个问题测试，你的诊断？

youdao

If this is only a test question, your dx?

如果仅是一个问题测试，你的诊断？

youdao