1.
A comment departing from the theme of discourse;a digression.
插话，插曲，穿插与讨论的主题无关的看法；离题话，
2.
Divagate from
（文章或谈话）离题
3.
People should speak briefly and to the point.
会上讲短话，话不离题。
4.
His remarks are far afield.
他的话离题太远了。
5.
What he's said is quite beside the mark/point/question.
他所说的话离题太远了。
6.
What you have said is beside point/off the point.
你刚才说的话离题太远。
7.
Your remarks are far afield.
你的话离题太远了。
8.
Your comments are an excursion from the major theme.
你的话偏离了主题。
9.
Your words wandered too far from our subject being discussed.
你的话离我们正在讨论的话题太远。
10.
Don't diverge to another topic.
不要离开本题而扯到另一话题上去。
11.
The Interpretations of Li Sao: an Ancient but Everlasting Topic
《离骚》解题:一个古老而常新的话题
12.
I'd like to depart from the main subject of my speech for a few moments.
我想暂时离开演讲的主要话题说几句话。
13.
Once he starts talking, he will go far afield from his original topic.
他只要一开始说话，就会偏离原来的话题。
14.
I'd like to depart from the main subject of my speech for a moment
我想稍离讲话的主题一会儿。
15.
Please stick to the point, what you're saying is irrelevant.
请不要离题，你说的尽是不相干的话。
16.
He is in the habit of branching out in his speech.
他讲话时总是要离开本题。
17.
I know what you're saying, but that's beside the point.
我明白你说的话，但它脱离了本题。
18.
She tends to sheer away from any discussion of her divorce.
一谈到她离婚的事她就尽量转换话题.