大家好，歡迎來的餅哥英語的頻道，今天我們分享一個非常有用且地道的表達——roll back, 這個短語的含義不是指「滾回去」，其正確的含義是：
roll back 削弱，限制，降低
He wants to roll back laws designed to clean up the air, water and land.
他想削弱旨在保持空氣、水源和土地清潔的法律。
If you roll your prices back, it will be much harder to raise them again without a lot of customer complaints.
如果你把價格減少，再想漲價，而且讓很多顧客不投訴，就會難上加難。
The store rolled all its prices back for the sale.
對於銷售，店家把所有的價格都降低了。
The protesters in England demanded that the big oil companies roll back their prices.
英國抗議者要求大石油公司限制石油價格。
We had to roll back prices to compete with the discount stores.
我們不得不降低價格和打折店進行競爭。