The new sealing cap - similar to a smaller version of the damaged blow-out preventer - has three devices that are designed to shut the flow.
新的密封帽类似一个较小版本的损坏井喷防护装置，有三个旨在关闭流量的装置。
Following the explosion and fire on the rig, the blow-out preventer on the sea bed should have automatically sealed the well, but it failed, resulting in the massive oil spill.
在油井发生爆炸以及油井起火后，海底上的防喷器本来应该自动将油井封住，但是未能做到这一点，导致大规模的石油泄漏。
The well is still gushing, however. BP's technicians have been unable to activate the blow-out preventer, essentially a massive valve that must be operated remotely by robot submarines.
钻井中的原油仍在涌出，但是BP的技工们却不能启动井喷防控装置，这个装置本质上是一个必须由机器人潜艇远程操控的巨大阀门。
The well is still gushing, however. BP's technicians have been unable to activate the blow-out preventer, essentially a massive valve that must be operated remotely by robot submarines.
钻井中的原油仍在涌出，但是BP的技工们却不能启动井喷防控装置，这个装置本质上是一个必须由机器人潜艇远程操控的巨大阀门。
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