人口统计学

population studies / population statistics

person; people / CL:個|个[ge4],位[wei4]

population / people

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls

to gather / to unite / to unify / whole

statistics / to count / to add up

surname Ji

to calculate / to compute / to count / to regard as important / to plan / ruse / meter / gauge

statistics

to learn / to study / to imitate / science / -ology