单词：productive resources
productive resources的用法和样例：
例句
- Economics is the study of how people choose to use scarce or limited productive resources.经济学研究人们如何进行抉择，以使用稀缺的或有限的生产性资源。
- The last part is principle of developing and using of generative curriculum resources in history class.第四部分是开发与利用历史课堂生成性资源的原则。
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