今天我们必须负责任地开采煤炭，这样我们的孩子才能继承能源安全和健康的环境。
We must mine coal responsibly today so that our children inherit both energy security and a healthy environment.
当我们保护生物多样性时，我们就是在保护人类的安全网。
The very reason I write is so that I might not sleepwalk through my entire life.
领导力就是做出艰难的决定并坚持到底，即使这些决定不受欢迎。