单词：material cycle
material cycle的用法和样例：
例句
- This paper studies the general behaviors of energy flow and material cycle in agroecosystem in Aksu area.以阿克苏地区为对象研究了该区农业生态系统中能量流动和物质循环的一般特征。
- As the material supply, the southern pine timberwork system offers landscape designers an ecological way on the side of material circulation and energy consume.美国南方松木构系统作为材料供应在物质循环和能量消耗方面，为设计师特别是景观设计师提供了良好的生态环保途径。
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