当最后一棵树被砍倒,最后一美元将失去意义。
The great powers are always searching for opportunities to gain power at the expense of their rivals, and they will use force if they believe it will bring them strategic advantage.
"Behavior cannot be divorced from its adaptive context."
The history of life is a history of innovation.
The future of food depends on our ability to balance productivity with responsibility.
I don't let negativity bring me down.