真正的痛苦不是来自外部，而是来自我们如何理解它。

The Liskov Substitution Principle is a fundamental concept in object-oriented programming, stating that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.

Marine ecological balance is more important than short-term economic benefits, we must have long-term vision.

译文：钱财能让人获得幸福，但它也能带来祸患，有钱人一定要知晓；药物能救人，但也能杀人，用药的人一定要慎重对待。赏析：钱财如药材一样，它能治病救人，也能致人死亡。金钱的好与坏，在于人如何使用它。

孔子说：“《关雎》这篇诗，快乐却不淫秽，悲哀却不伤痛。”