Some things used in production (such as fuel)would scarcely in common language be called by either name,popular phraseology being shaped out by a different class of necessities from those of scientific exposition.

• 生产中使用的某些物品（例如燃料）在日常用语中也许既不称为工具，也不称为原料。由于不同性质的需要，通俗用语和科学术语是不一样的。