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- At last, considering the environmental protection and reducing the cost, this paper processes a primary discussion on the question of using a kind of natural refrigerant R600a or some mixing refrigerant to replace the refrigerant R134a. 最后，从环境保护和降低成本的角度出发，本文就SC6350空调系统采用天然工质R600a以及采用价格低、环保性能达标的混合工质MTL-1替代目前使用的“绿色”制冷剂R134a进行了初步的探讨。
- As the natural refrigerant, CO2 takes a prominent environmental advantage over the freon refrigerants. 作为自然工质，CO2在氟利昂制冷剂替代中具有突出的环保优势。
- Studied thermal properties and cycle charactes of the CO_2 natural refrigerant in order to make CO_2 transcritical cycle more perfectly and to substitute for CFCs and HCFCs refrigerants. 对自然工质CO_2的热力性质、循环特性进行分析研究,以求进一步完善R744循环,以替代CFCs和HCFCs制冷工质。
- It will take time to replace HFCs by more preferable substances such as natural refrigerants. 因此，深入了解这些常用制冷剂的基本热物理性质不仅对于完善现有物质的基础实验数据具有重要意义，而且也是今后制冷剂替代研究的基础。
- On the basis of theoretical and experimental study of the Reverse-Brayton Cycle with binary natural refrigerants, this study was put forward. 在二元天然工质应用于逆向布莱顿循环的理论与实验研究基础上，提出了本课题。
- It is natural for a cat to catch mice. 猫捉老鼠是本能。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
- Many natural materials are becoming scarce. 许多天然原料越来越少。
- Our motherland flows with natural resources. 我们祖国蕴藏着丰富的天然资源。
- Events took their natural course. 事态依自然进程发展。
- She has a natural wave in her hair. 她的头发自然卷曲。
- Magnetism is a natural phenomenon. 磁力是一种自然现象。
- The thermodynamic analysis and comparison on low temperature natural refrigerant cascade cycle 自然工质低温复叠式制冷循环的热力学分析与比较
- It is difficult to be natural when one is tense. 人在紧张的时候很难泰然自若。
- The egoism of an artist sometimes seem natural. 艺术家的自负有时看起来是自然的。
- They used only natural pigments to dye the wool. 他们只用天然颜料染毛织品。
- Children are natural exhibitionists. 儿童天生喜欢自我表现。
- Everything we used was made from natural materials. 我们所用的一切都是由天然材料做成的。
- It's quite natural that you should succeed. 你的成功是很自然的事情。
- He's a natural for the role of Lear. 他是李尔王这一角色的理想人选。
