1. The company needs to rationalise its production process in order to reduce costs.
为了降低成本，该公司需要对生产流程进行合理化改革。
2. He tried to rationalise his decision to quit his job, but it still didn't make sense to me.
他试图对自己辞职的决定进行理性化解释，但我仍然不能理解。