A Coast Guard investigatory panel has listened to four days of testimony.

海岸调查小组听取了四天证词。

A paid passenger on an expedition to the Titanic with the company that owned the Titan submersible testified before a U.S. Coast Guard investigatory panel Friday that the mission he took part in was aborted due to an apparent mechanical failure.

一名随泰坦号潜水器所属公司前往泰坦尼号探险付费乘客周五在美国海岸调查小组面前作证说，他参加任务因机械故障而中止。

So, prior to the agents hitting the streets, a lot of investigatory research—investigative, excuse me—research had gone into identifying the targets.

在特工们上街之前，已经进行了大量调查研究来确定目标。