在气候多变的时代，适应是生存的关键。
食品安全是企业的生命线，没有安全就没有一切。
The beauty of mathematics lies in its ability to simplify complex problems.
What other dungeon is so dark as one's own heart! What jailer so inexorable as one's self!
研究学习的唯一有意义的方法是通过客观测量。