cost- effective principle的用法和樣例：
例句
- Both follow the cost-benefit principle based on natural resource scarcity.
兩者都遵循基於自然資源稀缺性的成本與效益原則。 - The specificity of forest ecology value accounting decides that it should obey the social principle, the economic and ecological efficiency principle.
森林生態價值會計的特殊性決定了必須遵循社會性原則及兼顧經濟效益和生態效益原則。
