4)追问。据说任何问题只要连续追问6个为什么就能真相大白,又据说某日本企业就有所谓连续追问5个为什么的问责制度。追问为什么能帮助你去识别那些平时熟悉了的知识点,这一点或许对答辩很有帮助。比如今天我写道: In attributional LCA, average current technology is often used in the background data...我突然问自己,什么是background?这个问题如果给一个实例我可以解释,但是background的定义是什么?查了一下ILCD手册,发现原来foreground、background与attributional和consequential LCA的区分是有关的,晕,之前我并没有从这个角度去理解它们的区别,既然如此,再去看Weidema 2003的文章,哇,已经很明确地解释了: a foreground process is a process whose production volume will be affected directly by the studied change; a background process is a process whose production volumes will not be affected or only be indirectly affected (i.e. only through the market)as a consequence of the increase or decrease in demand as a result of the studied change.