奥巴马宣布的措施将包括堵塞声名狼藉的勾选漏洞，这一漏洞通过将收入转移到企业位于海外避税天堂的子公司，让企业规避美国和外国税收。
The steps announced by the president would include closing down the notorious check box loophole that enables companies to avoid US and foreign taxes by shifting income to subsidiaries based in offshore tax havens .
勾漏洞