Every life leaves behind a trail of evidence; the biographer is the detective who follows it.
每个生命都会留下证据的痕迹；传记作者就是追踪这些痕迹的侦探。
It is a capital mistake to theorize before one has data.
Sustainability isn't a trend—it's a responsibility we owe to future generations.
牛大叫，但马却不回应；不是因为马没听到声音，是因为它们不是同类啊。点评：同类之间存在着客观联系，故能相应。