We must balance immediate energy needs with long-term sustainability goals.
The world has the technology - either available or well advanced in the research pipeline - to feed on a sustainable basis a population of 10 billion people.
煤炭的真正成本不仅在于价格，还在于我们如何管理其后果。
我们完全可能是在从错误的侧面考察世界，要找到有关世界的正确答案，也许需要改变视点、从世界的另一面考察它，即从心理内部而非心理外部考察。
未来属于那些相信自己梦想之美的人。
And when his audience grew bored, he would spring into the air and do a back flip with a half twist.
当他的观众感到无聊时，他会跳到空中，做一个半扭的后空翻