安全不仅仅是一项政策，它是一种从高层开始的文化。
Safety isn't just a policy, it's a culture that starts at the top.
The Langlands program is a vision of how mathematics could be seen as a single, coherent whole.
The greatest danger to American agriculture is the loss of the family farm.
我总是相信，如果你陷入困境，也许事情并不顺利，你会变得更强大。