As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.

我没有写下我所见所闻的一半，因为我知道人们不会相信。

可持续性不仅仅是种树；而是种下能成长为行动的想法。

It is vain to talk of the interest of the community， without understanding what is the interest of the individual.

最好的保护策略是将经济激励与生态效益结合起来。