任何人做一个重复或有规律任务知道一个问题：有时做了数十次或上百次同样的事，突然会出错。
ANYONE undertaking a repetitive or routine task knows the problem: suddenly something they have done dozens or hundreds of times before goes wrong.
这个地区的居民每年能看到数十次北极光，而那些居住在更北边的巴罗角的人们更可以看到上百次之多。
Residents of the region witness dozens of auroras yearly; those in the Point Barrow area farther north see as many as a hundred.
布赖恩坎贝尔领导的乌汶耶珠河烤肉队已经参加了71场孟菲斯网站举办的烤肉比赛，获奖数十次。
Brian Campbell, whose team (Ubon's BBQ of Yazoo) has competed in 71 Memphis-sanctioned events and won dozens of awards, says “the money is break-even, at best.
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