The FASB and IASB have been exactly that, cleaning up rules on stock options and pensions, for example, against hostility from special interests

這句話是來自出考研試題；似乎句子The FASB and IASB have been exactly that against hostility from special interests 。在that 和against 中間插入了一些成份，后來查了一下詞典that倒是也可以做副詞。但是請問老師這是一種正確的結構嗎？而且我覺的這個插入結構放到句尾不是更好嗎？