light, volatile, colourless, flammable, poisonous liquid with a distinctive odour that is somewhat milder and sweeter than ethanol
person who is to be engaged, is engaged or has been engaged in a remunerated activity in a State of which he or she is not a national
time spent serving in the armed forces, especially as a compulsory period for young people in some countries
Work equipment that can carry out work while travelling between different locations
modelling based on human society or social relations, like ethnic group or region, as opposed to modelling based on individual-level, like age or gender
systematic measurement of variables and processes over time to ensure that certain standards or conditions are being met or to examine potential changes with respect to certain baselines