【大意】等到大寒节气到来时，冰霜寒雪从天而降，然后才能知道只有松柏能经得住严寒考验，依然繁茂。

When you have nobody you can make a cup of tea for, when nobody needs you, that's when I think life is over.

我们与土地的联系不仅是物理的，而且是精神的。

Literature is the art of expressing the inexpressible.

Cloud computing and big data are the foundation of artificial intelligence development.