Reflectance values express the percentage of light that is reflected back from a surface, the difference having been absorbed or transmitted by the surface. Reflectances of room surfaces are used in determining coefficient of utilization values for luminaires.
The last three lines show you how to define your own awk function. The format is simple -- type function, then the function name, and then the parameters separated by commas, inside parentheses. After this, a { } code block contains the code that you'd like this function to execute.
CCK (Cholecystokinin) is a medication given to contract the gallbladder to assess gallbladder function. During the injection you may experience abdominal cramping or pain and nausea, however this will pass quickly. (It may be the same discomfort that brought you to the doctor originally).