The HVAC engineer, for example, might value environmentalism more than money, where as the oil engineer values money more than environmentalism, which is why they chose their specific directions.

例如，暖通空调工程师可能看重环保主义甚于金钱，而石油工程师则看重金钱甚于环保主义，这就是他们选择具体方向的原因。