simple theory of types

例句：

1. 1. The simple theory of types is the foundation of modern computer science.
   简单类型理论是现代计算机科学的基石。
2. 2.This model provides a simple theory of types that can be applied to various domains.
   这个模型提供了一个简单类型理论，可以应用于各种领域。
3. 3. The simple theory of types has been widely used in data mining and machine learning.
   简单类型理论在数据挖掘和机器学习中得到了广泛应用。