We thought we had such problems. How were we to know we were happy?
农业的未来在于智慧农业。
People who say it cannot be done should not interrupt those who are doing it.
En la oscuridad, las palabras son la luz que nos guía.
Education’s rewards are too distant when today’s survival is urgent.
天子认为对的未必对，天子认为错的未必错。