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1·She digressed from her prepared speech to pay tribute to the president.

她偏离了预先准备的讲稿，对总统表示了敬意。《柯林斯英汉双解大词典》

2·I've digressed a little to explain the situation so far, so let me now recap.

我刚才稍微离题说明了迄今的情况，现在让我重述一下要点。《柯林斯英汉双解大词典》

3·I digressed off of my digression.

我过我的题外话题外话。

4·He digressed so often that it was hard to follow what he was saying.

他时常跑题，所以很难听明白他想表达什么。