可持续发展的关键是平衡经济增长和环境保护。
The key to sustainable development is to balance economic growth and environmental protection.
当我们发现保持不变比改变更痛苦时,我们就会改变自己的行为。后果给我们带来痛苦,激励我们去改变。
I think the key to directing is to be open to change.