Chinese: 一个工程师应该提的七个问题是：谁，什么，何时，哪里，为什么，怎样和多少。
English: The seven questions that an engineer has to ask himself are: who, what, when, where, why, how and how much.
French: Les sept questions que doit se poser un ingénieur sont : qui, quoi, quand, où, pourquoi, comment et combien.