track down侦察
Track slowing down路线慢行
Track u down追踪
track him down追捕到
track you down跟踪你
例：
They hope to track down the source of the infection.
他们希望查出这种传染病的根源.
That no time or money or energy on my part will be soared to track down this scoundrel and hale him before the proper authorities.
我自己决不会吝惜我的时间,我的钱,或是我的力量,一定要把这个流氓追捕归案,拖到官厅来!
Dr Ostrander has already used dogs to track down the genes behind certain cancers that the species shares with people,and to work out the dog family tree.
奥斯特兰德博士已经跟踪了狗类和人类某些共有癌症背后的基因,并作出了狗类的族谱.