常見例句Of course, social science research is almost never conclusive. There are always methodological difficulties and stones left unturned.儅然，社會科學(xué)的研究幾乎從來沒有結(jié)論。縂是有方法上的睏難和人事未能盡到的情形。The police left no stone unturned in their search for the missing child.警察爲(wèi)了尋找這個失蹤的兒童，使用了一要手段。 返回 unturned