For example, the students watching my youtube videos or the students in harvard university.. All is used widely in english language, if you have ever wondered how to distinguish its uses, take a look at this lesson:
Acute lymphoblastic leukaemia (all) starts from young white blood cells called lymphocytes in the bone marrow.. [~ + the + uncountable noun] she ate all the cake.[~ + some nouns of time] i waited for her call all.