distinct zero

例句：

1. 1. The unique zero in the equation represents the unknown variable.
   方程中的这个独特的零代表未知变量。
2. 2.The scientist discovered a new type of zero that has never been seen before.
   科学家发现了一种全新的零，之前从未见过。
3. 3. In mathematics, zero is often used to represent an absence or lack of something.
   在数学中，零常常用来表示某物的不存在或缺乏。