For sizing purposes, IBM capacity planners generally group mail users into four different categories based on workload characteristics: light, medium, heavy, and power users.

出于分级目的，IBM容量计划人员通常基于工作量特征将邮件用户分为四个种类：轻、中、重和强用户。

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It was up to Wei to make the final call and he broke convention by giving the green light to the four men, average age 27.

不过韦厂长最后拍板，决定打破陈规，给这四个人开绿灯，他们当时的平均年龄就27岁。

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There are also four external sensors for light, sound, touch, and ultrasonics.

还有四个外部传感器用于光、声、触觉和超声波方面。

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And his four-year-old startup Light in the Box is a good example.

FORBES: Beijing Startup Builds On Shoulders Of Giants To Go Global And IPO From China

Cloud is the IBF champion while fellow American Dawson - who does not hold one of the four recognised world light-heavyweight belts - is generally accepted as the leading operator at 175lbs and holds the unofficial Ring Magazine crown.

BBC: Nathan Cleverly plots world domination

Twenty-four hours of light bleaches out the structure of a day, so ship life becomes organized by meals and debarkations, either onto land or into the inflatable dinghies.

FORBES: Go with the Floe