医生诊断他的烫伤属于二度烧伤，需要特殊护理。

The doctor confirmed his ___second-degree burns required special care.

他被判二级纵火罪，因为火灾是由意外引起的。

He was convicted of ___second-degree arson because the fire started accidentally.

这个二次方程的图像是一条抛物线。

The graph of this ___second-degree equation is a parabola.