"false" . . . "\"tendency_of_X\" means derivative of X with respect to time. Air pressure is the force per unit area which would be exerted when the moving gas molecules of which the air is composed strike a theoretical surface of any orientation."@en . . "2017-07-24 14:36:59.0" . . . . "SDN:P07::CFSN0201" . . "2" . "2017-07-24 14:36:59.0" . "" . . "accepted"@en . "tendency_of_air_pressure"@en . "SDN:P07::CFSN0201" . . . "SDN:P07::CFSN0201" . "2" .