Global hunger won't be solved by charity alone - it requires systemic change.

互联网下半场是产业互联网。

The history of mathematics is a history of human thought and progress.

不自重自爱便自取其辱，没有畏惧心的人招致灾祸；不自我满足的人受到裨益，不自以为是的人见多识广。