供需

gōng xū supply and demand

比

bǐ (particle used for comparison and "-er than"); to compare; to contrast; to gesture (with hands); ratio

Bǐ Belgium; Belgian; abbr. for 比利時|比利时[Bi3 li4 shi2]

bì to associate with; to be near

公式

gōng shì formula

fanpianzicomgzRyjsp