And all labour,according to our present definition,must be classed as unproductive,which terminates in a permanent benefit,however important,provided that an increase of material products forms no part of that benefit.

• 按照我们在本书中所下的定义，所有那些带来持久利益的劳动，只要所获得的利益中不包含物质产品的增加，则不论多么重要，都应归入非生产性劳动类。