digresses
v.
离题，岔开话题( digress的第三人称单数 );
例句:
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She always digresses when telling a story.
她讲故事时老是离题.
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Talat Sadat, an aspiring politician often digresses into much broader conspiracy theories.
来自CNN
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In longer conversations, he often redirects the topic away from himself, then energetically digresses.
来自NEWYORKER