For some, it is merely a unit of work.

对一些人来说，它仅仅是一个工作的单元。

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An Activity is a unit of work assigned to an individual.

一个活动即是分配给每一个个体的单元。

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RR: Locks all the rows an application references within a unit of work.

RR：锁定一个应用程序在一个工作单元内引用的所有行。

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and a unit is generally 3 to 5 hours of work a week.

而且每门课通常是一周3到5个小时。

很好奇住宿生活 - SpeakingMax英语口语达人

This extreme density reduces, per a given unit of work, the datacenter size, energy consumption, complexity and cost.

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In the weeks before the invasion of Iraq the U.S. Agency for International Development told Bechtel National, a unit that handles government work, to expect a sensitive package of information about postwar reconstruction.

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Dr McGuire's report drew attention to the role of the "confidential unit" within the ombudsman's office and a lack of confidence among other staff in the work of this unit.

BBC: Justice Committee