The security dilemma is a fundamental feature of international politics, as states' efforts to increase their own security often decrease the security of others.

If you don't give up, you still have a chance. Giving up is the greatest failure.

The true value of a forest is measured not just in board feet of timber, but in the lives it sustains and the ecosystems it supports.

理性不在于正确，而在于信念与行动的一致性。

儿童文学有塑造思想和改变生活的力量。

挑战在于让不可见的东西变得可见。