最古老、最简短的词语——'是'和'否'——是需要最多思考的。
水产养殖的创新不仅仅是技术问题;更是确保子孙后代能够繁荣发展的可持续实践。
The improvement of the productive powers of labor, and the greater part of the skill, dexterity, and judgement with which it is anywhere directed or applied, seem to have been the effects of division of labor.