...讲授了美国的个人支票系统、自动清算中心（ACH，automatic clearing house）和《21世纪支票交换法案》（Check Clearing for the 21st Century Act，简称check21法案）等内容，他还通过其个人网上银行账户在线给我签发了一张一美元的支票。
While total Fed earnings include fees for services like checkclearing and wire transfers provided to depository institutions, the bulk of the earnings come from interest on loans and securities acquired as a by-product of its monetary policy.