Persistence is very important. You should not give up unless you are forced to give up.
Always be prepared. The more you know, the less you carry.
最高的道德不是遵循道德,而是实现道德与幸福的统一。
可持续发展不仅仅是保护树木;它关乎确保自然和人类共同繁荣的未来。