star witness

例句：

1. 1. The star witness testified that the car was stolen.
   这位明星证人作证称，那辆车是被盗的。
2. 2. The police asked the star witness to identify the suspect.
   警方请这位明星证人辨认嫌疑人。
3. 3. The star witness's testimony helped clear the case.
   这位明星证人的证词帮助澄清了案件。