4/ $DAI and $sUSD are overcollateralized stables - collateral is locked up for each DAI and sUSD in existence that would get automatically liquidated if the collateralization ratio falls below a certain threshold.
4/$DAI和$sUSD是过度抵押的马厩——为存在的每个DAI和sUSD锁定抵押品，如果抵押比率低于某个阈值，这些抵押品将自动清算。