The "service-users" - as the volunteers here call them - are a truly disparate group - some look as if they've just stepped off the tube after a busy day at work, others are unkempt and smell feral.

这些“服务使用者”——这儿的志愿者这样叫他们——确实是一群异类——有些人看上去好像刚从忙碌工作了一天的管子上下来，其他人则衣衫蓬乱，带着凶猛的气息。

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Transaction Class – An object which is used to group a set of work classes together and then associate them with a service policy.

事务类（Transaction Class） – 这种对象用于把一组工作类分组在一起，然后把它们与一个服务策略关联起来。

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A products or service that worked for one group won't work for another.

以前对一个群体能发挥作用的产品或服务不再适用于另一个群体。

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In addition, most providers have specific customer service teams that work on a small group of accounts, and that results in greater service consistency.

FORBES: What's the Best Jet for You? (Part 2)

W. Bush wrote the group an outraged letter defending those who work for the government, including one Secret Service agent killed in Oklahoma City who had worked on Bush's detail in the White House.

CNN: GOP and NRA: a love fest

Its service can work out at 25% cheaper than Concorde, if a small group shares a plane.

ECONOMIST: Air travel: After Concorde | The