你如果不懂就别说了
[nĭ rú guŏ bù dŏng jiù bié shuō le]
Translates quite straightforwardly, meaning 'if you don't understand, then don't speak', signaling impatience towards someone who might talk without fully grasping a subject. Reflects attitudes or frustrations encountered in daily interactions and possibly hints at a desire for communication based on true understanding rather than superficial or misinterpreted knowledge.