参议员听证会在华盛顿展开的同时，海岸警卫队和美国国家矿产局也在新奥尔良外举行自己的听证会，来完善关于事故原因的“理论”。
While the Senate hearing was unfolding in Washington, the coastguard and the MMS held their own hearing outside New Orleans to look at the developing theories as to what went wrong.
参议员听证会在华盛顿展开的同时，海岸警卫队和美国国家矿产局也在新奥尔良外举行自己的听证会，来完善关于事故原因的“理论”。
While the Senate hearing was unfolding in Washington, the coastguard and the MMS held their own hearing outside New Orleans to look at the developing theories as to what went wrong.
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