1. The police have so far failed to track down the attacker. 警方至今未能追捕到攻击者。
2. She had spent years trying to track down her parents. 她已经花了多年试图找到她的父母。
3. I hope the police track down these perverts and charge them with rape. 我希望警方追查这些性变态者，并以强奸罪起诉他们。
4. Car manufacturers stamp a vehicle identification number at several places on new cars to help track down stolen vehicles. 汽车生产商们在新车车身的几个地方打上车辆识别码以帮助追查被盗车辆。
5. In Amsterdam, officials are using Airbnb listings to track down unlicensed hotels. 在阿姆斯特丹，官员们正使用爱彼迎名单来追踪无证经营的酒店。
