Dr.Jennifer Ashton: This is the most prevalent, common incident and ailment and it's also the most difficult to treat.

珍妮弗·阿什顿医生：背痛是最普遍、最常见的问题和疾病，也是最难治的病。

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Take, for example, a common incident during a football game. The quarterback is hit, falls backwards, and bangs his head on the turf.

以橄榄球赛比较普遍的事件为例，四分卫触地得分，朝后方倒下，其头部就会猛烈撞击到草坪上。

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Paul Sullivan, executive director of Veterans for Common Sense, said that he and others had warned that an incident such as the one which unfolded yesterday had been on the cards for a long time.

退伍军人常识组织（Veterans for Common Sense）的执行官保罗·沙利文（Paul Sullivan）说，他和其他同事长久以来都在警告，昨天所发生的事件是有可能出现的。

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Last month, the singer was cautioned by police after admitting a common assault after an incident in Camden, north London.

BBC: No drug charges for Amy Winehouse

That incident was common knowledge round the state for months, and Mr Fields had promised an explanation at the end of the trial.

ECONOMIST: Louisiana politics

The Former Welsh Secretary Ron Davies made an impassioned speech to the House of Commons following the incident on Clapham Common which led to his resignation.

BBC: News | UK Politics | Ron Davies's speech in full