recognition code

例句：

1. 1. The recognition code is used to verify the authenticity of the product.
   识别码用于验证产品的真伪。
2. 2. The company uses a unique recognition code for each customer to track their purchases.
   该公司为每位顾客使用独特的识别码来追踪他们的购买记录。
3. 3. The recognition code is crucial in ensuring the security of sensitive data.
   识别码在确保敏感数据的安全性方面至关重要。