unicity theorem

例句：

1. 1. The unicity theorem states that the number of different ways to distribute a set of objects is equal to the number of objects minus one.
   统一性定理表明，将一组对象分配的不同方式的数量等于对象数量减去一。
2. 2. This theorem has been proven to be true in many cases, but it's still an open question in mathematics.
   这个定理在许多情况下已被证明是正确的，但在数学中仍是一个未解之谜。
3. 3. In this case, the unicity theorem applies because there are only two possible ways to distribute the items.
   在这种情况下，统一性定理适用，因为只有两种可能的方式来分配这些物品。