我除了在教堂听说教的时候以外,从来不会舒舒服服地睡觉.I never sleep comfortably except when I am at sermon.说教的人不身体力行,就只能空谈,不能起教育作用.Preachers can talk but never teach , Unless they practise what they preach.说教的口吻很大程度上是国内的政治主导的.The lecturing tone is...
探讨了 间甲酚 含量的容量分析方法.The determination ofm - cresol content by brominating volumetric method was investigated.利用间甲酚紫作指示剂定量地测定食醋中总酸的含量.This paper suggested am - cresol purple, which could determine quantitatively the content...