Determine if it's satisfiable or not WITHOUT USING ANY EXTERNAL TOOLS.
"If we're producing technology our customers can't live with, that's our failing," he says, explaining that FireAngel alarms have been calibrated to avoid making them overly sensitive, in order to reduce false alarms.
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Each year the birds must stay on platforms of floating ice for long enough to replace weather-beaten feathers with new, waterproof coats.
昨晚，苹果 CEO Tim Cook 在社交媒体官宣：