to decant (tea) (from a big cup into a smaller one)
to pass from hand to hand
To pass bricks from one end of the courtyard to the other
diligent;  assiduous;  studious
To be a studious student;  to learn assiduously
to specialize in something;  to major in something;  to be expert in something
He specializes in repairing motorbikes;  he is expert in repairing motorbikes
My uncle is expert in acupuncture;  my uncle specializes in acupuncture
My younger sister majors in business administration
Both red and expert