Warning: file_put_contents(): Only 0 of 5043 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/69228.com/index.php on line 55 99久久国产热无码精品免费,国产免费爽爽视频在线观看
Percentage ration of the actual vapour pressure in the air to the saturation vapour pressure with respect to water at the same temperature and pressure. 空氣中的實(shí)際水氣壓與在相同溫度和氣壓下的水面飽和水氣壓的百分比。