At present, the coal production was deep operation in Pingxiang coal Industry Group co., so the safety production condition is difficult day by day, the production cost is increased and economic...

结合萍矿集团公司矿井普遍进入深部开采，安全生产条件日趋困难，生产成本居高不下，经济效益普遍低下的状况，开展煤炭地下气化项目有其重要的现实意义。

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Central to the operation is a mile-deep well, dug originally to explore for oil.

那次行动的重点是一口原本为勘探石油而挖的一英里深的井。

《柯林斯英汉双解大词典》

Alvin, which began operation in 1964, was the first deep-sea submersible capable of carrying passengers.

阿尔文潜水器开始运行于1964年，是第一个能够运载乘客深海潜水器。

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A surgical operation called deep-brain stimulation also is used to treat Parkinson's disease.

VOA: special.2010.11.02

Unlike other ocean technologies, generating power through osmosis doesn't involve operating in the harsh environment of, say, a deep sea operation.

FORBES: Getting Power From Salty Water

Given that Orion is a manned capsule, these systems would no doubt need to be taken to a new standard of assurance and adapted for deep-space operation, but the proposition seems very well suited to ATV's capabilities.

BBC: Europe ponders future of ATV space truck

The blame is being laid squarely on the shoulders of BP, under whose auspices the deep-sea drilling operation is being conducted.

FORBES: Blame Big Bad BP For Now, but Where Is the Next Oil to Come From?