First, remote-controlled robot submarines have been deployed to try to seal off the oil well altogether by activating a massive device called a blowout preventer.

首先，他们已经部署了遥控机器人驾驶的潜水艇潜入水下试图通过激活防喷器来关闭油井。

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Activated after the blowout, it would have done nothing to save the rig, but should still have been able to isolate the oil in the well from the sea above it.

但事发后才激活它，则不能挽救这个钻井平台，却仍然能够封住井内的原油而不与井上海面的浮油接触。

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The flow of oil ceased, for the first time in the three months since a blowout in the well doomed the rig which had drilled it, Deepwater Horizon.

这是自“深水地平线”海上石油钻井平台被井喷破坏三个月以来漏油首次被控制住。

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Washington (CNN) -- The public may have seen the last video images of the failed blowout preventer from the BP oil well disaster, as authorities expressed possible security concerns.

CNN: Public may not see failed blowout preventer from BP oil well

The remote-controlled submarines are being used by BP in an attempt to activate the well's blowout preventer to choke the flow of oil.

CNN: Oil spill from rig explosion at 5,000 barrels a day

BP, which had been leasing the rig from Transocean, says the safety device that was supposed to cut oil flow on the ocean floor in the event of a well blowout did not perform its function.

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