weak duality theorem

例句：

1. 1. The weak duality theorem suggests that the relationship between two variables is not always linear.
   弱双性定理表明两个变量之间的关系并不总是线性的。
2. 2.This weak duality theorem has been proven to be a powerful tool for analyzing complex systems.
   这个弱双性定理已被证明是分析复杂系统的强大工具。
3. 3. In this paper, we will discuss the application of the weak duality theorem in solving some practical problems.
   在本文中，我们将讨论弱双性定理在解决一些实际问题中的应用。