pattern sum的用法和样例：
例句
- Surprise is a strong lack of agreement between the expected pattern and what actually occurs.
令人惊讶的是，我们期望的模式和实际情况相去甚远。 - Soon following, the haymarket check pattern and the equestrian knight logo appeared on many of their items.
不久后，在干草市场检查模式和马术骑士标志出现在他们的许多物品。
