idiom
Supply and demand
何かがどれだけ利用可能で、人々がそれをどれだけ欲しがっているかの関係。
Meaning
The relationship between how much of something is available and how much people want it.
Example
The price of oil depends largely on **supply and demand**.
石油の価格は主に**供給と需要**に依存しています。