今天我们要学的词是roll back. To roll back 意思是回归到原来的水平或状态，也有取消，减少的意思。U.S. President Donald Trump signed an executive order to roll back regulations on businesses. 美国总统川普签署行政令，取消对企业的部分法规。Danish business minister Brian Mikkelsen wants the European Union to roll back some of its financial regulations. 丹麦商业部长米克森希望欧盟取消一些金融法规。好的，我们今天学习的词是 roll back, roll back, roll back...