bar relay

例句：

1. 1. 条形码
   Bar Code
2. 1. The bar code is used to identify products in the warehouse.
   条形码用于仓库中识别产品。
3. 2. In the bar code relay race, each team has a unique code that they need to decode.
   在条码接力赛中，每个团队都有一个独特的代码，他们需要解码。
4. 3.The bar code relay race is a fun way for children to learn about technology.
   条码接力赛是孩子们学习科技的好方法。