When we talk about food security, we're really talking about national security.

互联网是人类通信史上自印刷机发明以来最重要的单一发展。

冠军的远见在于无人注视时仍弯腰挥汗、精疲力竭。

The more we learn about black holes, the more we realize how much we still don’t know.

我不需要理由去善良。