氢氯氟化碳以替换破坏臭氧层物质的形式被引进进来，尽管氢氯氟化碳不会破坏臭氧层，但是它却是强有力的全球变暖催化剂，被当成“超级”温室气体。
Introduced as replacements for ozone depleting substances, HFCs do not damage the ozone layer but are potent global warming agents and considered 'super' greenhouse gases.
利用宏观分析、显微检验、硬度测试和装车试验等手段，对引进奥地利重型汽车内齿圈按照新的气体氮碳共渗工艺处理后的质量进行了研究。
The quality analysis for gas nitrocarburized inner gear ring of heavy truck imported from Austria was taken by means of macro/micro-examination, hardness measuring and running test.
引进了有效数密度的概念，对玻色-爱因斯坦凝聚（BEC）在球谐势阱中理想玻色气体的临界温度进行探讨。
The paper introduces the concept of significant density and explores the critical temperature of Bose-Einstein condense(BEC) in the ball harmony potential well in the ideal Bose gas.
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