在爱丁堡，影子很长，秘密更深。

I never guess. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.

可持续发展不仅是一种趋势，更是我们对未来的责任。

可持续性不是一种选择，而是我们对后代的责任。