解释：河流川泽中有污水，深山草野中藏有瘴气，美玉也有微小的瑕疵。
I'm just a kid trying to make a difference.
We are all exiles in some way, searching for a place to call home.
The best policies are those that last longer than a political term.
The world doesn't need more plastic—it needs smarter ways to use it.