投资于更清洁的煤炭技术就是投资于我们星球的未来。

永远不要拆除，永远不要移除或替换，总是添加、改造和再利用！

We must balance the need for energy security with the imperative of reducing emissions.

宁可选择自由的贫困，也不愿选择奴隶般的富裕。

Time is a slippery thing: lose hold of it once, and its string might sail out of your hands forever.

The language of mathematics is universal, transcending cultural and linguistic barriers.