解释：手指粗于胳膊， 胳膊粗于大腿， 病情必然很重。

解释：所谓把粮食积存在取之不尽的粮仓里，就是要努力从事粮食生产。

In the energy sector, collaboration is key to solving the complex challenges we face.

The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all.

Sustainability isn't an option; it's a necessity for the energy sector.