The most sustainable product is the one that lasts the longest.
Learning consists in the modification of certain mediating processes which operate between the stimulus and the response.
Every lump of coal we mine keeps the lights on in someone's home.
我不喜欢欠下人情，这样会压逼著我，令我觉得自己是个奴隶。我宁愿自己处理自己的事，不用依靠别人，能够完全独立。
The energy transition won't happen overnight, but we must make progress every day.