'Mr President, do you know the difference between refugees and immigrants?' – 'No. I don't understand that at all. I am a politician, not a scientist.'
Examples (Wiktionary)
Mandarin
我想问你一个问题,不晓得会不会很突兀。
我想問你一個問題,不曉得會不會很突兀。
wǒ xiǎng wèn nǐ yī ge wèn tí , bù xiǎo dé huì bù huì hěn tū wù .
I'd like to ask you something. I don't know if it might be too out of the blue.