4/ ERC-20 in DeFi:
As an example, $USDC deposited on lending platform Compound returns cUSDC which is an ERC-20 token, which continuously accrues interest; the exchange rate between cUSDC/USDC changes over time.
4/ERC-20英寸DeFi：
例如，美元存于贷款平台的复合回报cUSDC，这是一种ERC-20代币，可持续计息；cUSDC/USDC之间的汇率随时间变化。