所有的变化，即使是最渴望的，也带着忧郁；因为我们留下的是一部分的自己；我们必须告别一种生活，才能进入另一种。
I'm just trying to be better every day.
Our farmers are the backbone of this industry; we must support them with both technology and fair policies.
寻找互反律是数学史上的一个基本主题。
The value of unpaid work is often invisible in economic measures, yet it is the backbone of society.
无偿工作的价值在经济衡量中常常不可见，但它却是社会的支柱。