释义：通过分析物品的过剩与短缺，就能判断其价值的高低。这句话揭示了市场供求关系对价格的影响。

Innovation in oil extraction isn't optional—it's essential for meeting the world's energy demands.

Innovation is not a slogan, but action.

永不止步地学习，因为烘焙如同生活，是一门无止境的学问。