她以严谨的态度完成了这项复杂的实验。

She completed the complex experiment with great ___rigour.

探险队必须忍受沙漠中的严酷环境。

The expedition had to endure the ___rigors of the desert conditions.

学校以严格的纪律标准执行校规。

The school enforces its rules with great ___rigour.