canonical state variable

例句：

1. 1. The canonical form of the sentence is "I am a student."
   这个句子的标准形式是“我是一名学生。”
2. 2.In mathematics, the canonical form of a polynomial equation is its coefficients arranged in descending order.
   在数学中，多项式方程的标准形式是将系数按降序排列。
3. 3. The canonical form of a mathematical proof is the simplest way to express it.
   数学证明的标准形式是最简表达方式。