1. The new retail of e-commerce refers to a new retail model in which individuals and enterprises rely on the Internet and use advanced technologies such as big data and artificial intelligence to upgrade the production, circulation and sales processes of goods, thus reshaping the business structure and ecosystem, and deeply integrating online services, offline experience and modern logistics. 2. In the future, e-commerce platforms will soon disappear, and the combination of online and offline and logistics will produce new retail. Online refers to the cloud platform, and offline refers to the sales of stores or manufacturers. The new logistics eliminates the inventory and reduces the quantity of goods stored. 　　內(nèi)部函數(shù)（僅合約內(nèi)部可以調(diào)用） 　　_mintFee 　　代碼速覽 　　function _mintFee(uint112 _reserve0,uint112 _reserve1)private returns(bool feeOn){ 　　address feeTo=IUniswapV2Factory(factory).feeTo(); 　　feeOn=feeTo!=address(0); 　　uint _kLast=kLast; 　　if(feeOn){ 　　if(_kLast!=0){開發(fā)案例：I35 software 7O98 development o7I8 　　uint rootK=Math.sqrt(uint(_reserve0).mul(_reserve1)); 　　uint rootKLast=Math.sqrt(_kLast); 　　if(rootK>rootKLast){ 　　uint numerator=totalSupply.mul(rootK.sub(rootKLast)); 　　uint denominator=rootK.mul(5).add(rootKLast); 　　uint liquidity=numerator/denominator; 　　if(liquidity>0)_mint(feeTo,liquidity); 　　} 　　} 　　}else if(_kLast!=0){系統(tǒng)源碼：mrsfu123 　　kLast=0; 　　} 　　參數(shù)分析 　　函數(shù)_mintFee的入?yún)⒂?個，出參有1個，對應(yīng)的解釋如下： 　　function _mintFee( 　　uint112 _reserve0,//token0的資金池庫存數(shù)量 　　uint112 _reserve1//token1的資金池庫存數(shù)量 　　)private returns( 　　bool feeOn//是否開啟手續(xù)費 　　){ 　　... 　　}