digressing
v.
离题，岔开话题( digress的现在分词 );
例句:
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I tried to keep it to the point, but he kept on digressing.
我试图说得中肯, 但他不断岔开我的话题.
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Think of it not as messing so much as digressing.
来自ECONOMIST
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Digressing, I never feel guilty flying first class anymore.
来自WSJ