嫌疑人最终被当局追踪到了。

The suspect was eventually ___tracked ___down by the authorities.

经过长时间搜索，他们终于在偏远山谷里找到了失踪的徒步旅行者。

After a long search, they managed to ___track the missing hiker ___down in the remote valley.

调查人员花了数年时间才追踪到非法资金的来源。

It took years for the investigators to ___track ___down the source of the illegal funds.