放空气 meaning in English

drop a hint; spread word; create an impression
◇放空气阀 purge valve

To get mass flow rate of vent gas and coarse aeetaldehyde from their volume flow rate data , density compensations are performed with regressed relationship between density and ( temperature , pressure and concentration )
针对包含化学反应过程的生产流程，提出了基于原子衡算的数据调和算法，并将之应用于乙醛生产过程的数据调和。调和计算中考虑了粗乙醛流量和小放空气体流量的密度补偿。
She was for the moment wholly at sea , anxious to think for herself , and wondering what new deception was this which caused him to give out that she was ill when she was not . another case of her company not wanted , and excuses being made . she resolved to find out more
她一时间还茫无头绪，急于自己琢磨琢磨，他究竟又在玩什么骗局，为什么她没有病却放空气说她有玻这是又一个例子说明他不愿意带她出去，还找了借口掩饰，她下决心要打听出更多的事情来。