zero-zero

例句：

1. 1.The number of zeros in the sequence is 10.
   序列中零的数量是10。
2. 2. The zero-zero pattern is a classic example of symmetry.
   零零模式是一种经典的对称例子。
3. 3. The zero-zero sequence has been used to represent the absence of something.
   零零序列被用来表示某物的不存在。