In mathematics, truth is always relative to the system you're working in.
在数学中,真理总是相对于你所在的系统而言的。
我们必须在经济增长和环境责任之间取得平衡。
No matter what he does, every person on earth plays a central role in the history of the world. And normally he doesn't know it.
真相是一面镜子,反映出我们真正的样子。