The anarchic nature of the international system forces states to compete for power.
I don't let the world change my dreams.
孩子的精神比一般人认为的更为高尚。
Farmers are the original environmentalists; we must support them in this critical role.
重点不是预测未来，而是为未来做好准备。
The ultimate goal of artificial intelligence is to create machines that can perform tasks that would require intelligence if done by humans.