本题

zhè yī duàn wén zì gēn běn tí wú guān yīng shān qù

这一段文字跟本题无关，应删去。

This paragraph has nothing to do with the topic, and should be deleted.

qǐng wù lí kāi běn tí

请勿离开本题。

Please keep to the point.

jǐn kòu běn tí

紧扣本题

stick to the point

tuō lí běn tí

脱离本题

off the point

nǐ shuō de yǔ běn tí bù xiāng guān

你说的与本题不相关。

What you said is irrelevant to the subject.

jiǎng huà rén lí le běn tí

讲话人离了本题。

The speaker has gone off the subject.

tā céng jì gěi wǒ guān yú běn tí de yī piān lùn wén

他曾寄给我关于本题的一篇论文。

He sent me a memoir on this subject.