扯到题外去
Let's digress
以上为机器翻译结果，长、整句建议使用 人工翻译 。
约翰的发言会很切题，不会扯到题外去。
John will speak to a point that is pertinent, and not travel out of the record.
youdao
当发言人第三次扯到题外去时听众发出喊声，使他讲不下去。
The audience cried the speaker down as soon as he started on a third digression.
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