nonzero digit

例句：

1. 1. The computer has a nonzero digit in the middle of its display screen.
   计算机显示器中间有一个非零数字。
2. 2.In mathematics, a nonzero digit is any digit that is not zero.
   在数学中，非零数字是指任何不是零的数字。
3. 3.The number 520 is often used as a symbol for love and friendship.
   数字520经常被用作爱情和友谊的象征。