N acetylcysteine ( NAC ), a precursor of glutathione, is a thiol antioxidant.N-乙酰半胱氨酸 ( NAC ) 为谷胱甘肽的前体, 是一种含有巯基的抗氧化剂.Error is often the precursor of what is correct,but conceit is the prelude to a fall.错误往往是正确的先导,骄傲是跌跤的前...
Error is often the precursor of what is correct.错误常常是正确的先导.Real tennis, an ancient precursor of the modern game, originated in the eleventh century.室内网球，现代网球运动的古老前身，起源于11世纪。Error is often the precursor of what is correct...
She has recently begun to slouch over her typewriter.最近，她坐在打字机前就开始变得无精打采的。A red supergiant , Betelgeuse is no slouch of a star either.参宿四是一颗红色的超巨星.One can appear to be about two inches shorter by practicing a slouch.装成没精...
罗伊用简单的、人人都能理解的语言讲述了他那个伤感的故事。Roy told his sorrowful tale with simple words anybody could understand.她喜欢伤感的爱情故事、老电影以及诸如此类的东西。She loves soppy love stories, old films, that sort of thing.这是一首极为伤感的浪漫小曲.This is a romantic ball...