identity signal

例句：

1. 1.The police were able to identify the suspect by comparing fingerprints.
   警方通过比对指纹成功地识别了嫌疑人。
2. 2. The company's logo is a strong identity signal for its brand.
   公司的logo是其品牌的强大身份信号。
3. 3.In this case, the identity signal was crucial in determining the winner.
   在这种情况下，身份信号在决定胜者方面至关重要。