equivalent of binary tree

例句：

1. 1. The two numbers are equivalent to each other.
   这两个数字是等价的。
2. 2.The price of the goods is equivalent to that of the competitor's.
   这些商品的价格与竞争对手的价格相当。
3. 3.The theorem states that the sum of two numbers is equivalent to the product of their reciprocals.
   该定理表明两个数之和等于它们的倒数之积。