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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The rift (pictured, around 80 metres wide and 50 metres deep) was first seen in mid-October by NASA's Operation IceBridge project, which released images last week.

这条裂纹最初由NASA的“冰桥行动”组在10月中发现，照片在上周发布。

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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?