你对那个问题的现实情况和历史情况既然没有调查，不知底里，对于那个问题的发言便一定是瞎说一顿。
你對那個問題的現實情況和歷史情況既然沒有調查，不知底裏，對於那個問題的發言便一定是瞎説一頓。
nǐ duì nà ge wèn tí de xiàn shí qíng kuàng hé lì shǐ qíng kuàng jì rán méi yǒu diào chá ， bù zhī dǐ lǐ ， duì yú nà ge wèn tí de fā yán biàn yī dìng shì xiā shuō yī dùn ．
When you have not probed into a problem, into the present facts and its past history, and know nothing of its essentials, whatever you say about it will undoubtedly be nonsense.