可持续性不是一种选择；它是农业前进的唯一道路。

No president who performs his duties faithfully and conscientiously can have any leisure.

The study of mind should be the study of its adaptive functions.

You win championships by character and by playing together as a team.

The play was a great success, but the audience was a disaster.

可持续性不是一种选择，而是长期成功的必要条件。