Libra2.0白皮书2020年4月最新发布！共29页 ThisupdatedwhitepaperoutlinesthesignificantworkwehavedoneonthedesignoftheLibrapayment systemsinceJune2019.Fourkeychangeshavebeenmadetoaddressregulatoryconcernsthatdeserve specificattention,eachofwhichisaddressedbrieflybelowandthen