【经】 beginning average method
a period of time; expect; sheduled time
【化】 term
【医】 period; phase; stadia; stadium; stage; time
【经】 term
at the beginning of; early; elementary; first; original
【医】 arch-; arche-; prot-; proto-
【计】 method of average
【经】 average method; method of of averages