Definition
To be very close to catching or finding someone.
追踪很緊
The police are hot on the fugitive's track and are closing in.
警方緊追在逃犯之後，正在逼近。
The journalist was very keen to find the source, and he is hot on the trail of a lead.
記者非常熱衷於找到消息來源，他正在緊追一條線索。
The detectives were confident that they were hot on the jewel thief's track.
偵探們確信他們緊追在珠寶竊賊之後。