I shall, therefore, in this treatise, when speaking of wealth, understand by it only what is called material wealth, and by productive labor only those kinds of exertion which produce utilities embodied in material objects.

• 因此在本书中，讲到财富时，指的仅仅是物质财富，生产性劳动指的仅仅是这样的努力，这种努力产生了体现在物质对象中的效用。