supply and demand
noun /səˌplaɪ ən dɪˈmɑːnd/
/səˌplaɪ ən dɪˈmænd/
[uncountable] (economics- the relationship between the amount of goods or services that are available and the amount that people want to buy, especially when this controls prices
供求关系 - the law of supply and demand
供求定律
- the law of supply and demand