two functionsLike GCHQ the NSA has two functions.
function of local
many functionsI think there are many functions that it serves.
basic functions'Housekeeping' proteins are common to most cells and are needed to carry out all those basic functions that most cells require, such as the production of energy.
language functionsThey present and practise grammar and useful language functions, such as explaining, defining and comparing.
social functionsGo out and mix with people — in their homes, at social functions, on public transport, in community activities.
main functionsOne of its main functions is that of giving in-service training on the shop floor."