roll back   (TTS發音)

1. reduce（the price of a commodity）to a former level 使（物價等）全面回落；降到原有水平

    Drastic measures have been taken to roll back commodity prices. 已採取有力措施全面回落物價。

2. repel；cause to fall back擊退

    We were confident that we could roll back the enemy forces that barred our way. 我們深信能擊退堵擊我們的敵軍。

    The new administration is confident of rolling back the tide of unrest which is sweeping the country. 新政府自信能擊退這股席卷全國的動亂浪潮。

3. （a time in the past） return steadily to sb 's consciousness回到某人記憶中；漸漸回憶起過去某一段時間的事情

    As the grandmother spoke，the years rolled back and she saw herself as a small girl again. 當祖母講話時，過去的歲月逐漸回到記憶中來，她仿佛看到自己又是一個小孩子了。