It may be of some use to the public, by affording an easy proof of the prosperous condition of the country.

通过提供国家繁荣状况的简单证明，它可能对公众有一定的用处。

No food can afford a more decisive proof of its nourishing quality, or of its being peculiarly suitable to the health of the human constitution.

没有食物能提供更决定性的证据来证明它的营养品质，或者它特别适合人体健康。