解释：影子的弯曲与正直是随身体而变化的，根源不在影子自身；自己的屈曲与伸直是随外物而变化的，而不在于个人的主观意志。这就是保持谦退才能使自己处世为先的道理。

对你谈论牺牲的人，谈论的是奴隶和主人。而且他打算成为主人。

每个故事都是一次旅程，每次旅程都会改变我们。

Algorithms are not just for solving problems; they are also for understanding the world.

The best stories are those that leave something to the imagination.

Sustainability isn't a trend - it's the future of responsible manufacturing.