There is always engineering and improvement of capabilities ongoing, but certainly within the framework of further perfecting reliability and availability .

工程设计和功能总在不断改进，但都在进一步完善其可靠性和可用性。

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But ongoing engineering work on the Paddington rail line to west Wales will force many travellers on to the roads.

BBC: Arsenal jets beat travel chaos

While there are a number of ongoing investigations, including an independent review by the National Academy of Engineering, the purpose of this commission is to consider both the root causes of the disaster and offer options on what safety and environmental precautions are necessary.

WHITEHOUSE: Deepwater BP Oil Spill: Presidential Press Conference

While there are a number of ongoing investigations, including an independent review by the National Academy of Engineering, the purpose of this Commission is to consider both the root causes of the disaster and offer options on what safety and environmental precautions we need to take to prevent a similar disaster from happening again.

WHITEHOUSE: Weekly Address: BP Oil Spill Independent Commission