那个人最终被法国警方追踪到。

The man was finally ___tracked ___down by French police.

他们设法在悬崖底部追踪到他，他是不小心掉下去的，但悬崖太陡，登山者无法下去。

They managed to ___track him ___down at the bottom of the cliff, where he had accidentally fallen, but the cliff was too steep for the climbers to go down.

调查人员经过数月的监视后找到了泄露的源头。

The investigators ___tracked ___down the source of the leak after months of surveillance.