经济学

jīng jì xué economics (as a field of study)

需求

xū qiú requirement; to require; (economics) demand

与

yǔ and; to give; together with

yú variant of 歟|欤[yu2]

yù to take part in

供给

gōng jǐ to furnish; to provide; supply (as in supply and demand)

fanpianzicomCJX6aspx