背景材料：在夏延山的深处像一座城市一样的军事综合隧道，一度作为北美防空司令部(NORAD)的中心。
Background: Deep in the bowels of Cheyenne Mountain is a city-like military complex that once served as North American Aerospace Defense Command (NORAD) 's center.
北美防空司令部和保障圣诞老人出发的精灵小组深度合作，以此确定他的出发时间，但是从那一刻开始，圣诞老人说了算，我们只能追踪他。
Norad co-ordinates with Santa's elf launch staff to confirm his launch time, but from that point on, Santa calls the shots. We just track him.
此网站每5分钟更新一次，这个所谓的“北美防空联合司令部追踪圣诞老人”项目有德语，西班牙语，法语，意大利语，日语和英语的链接。
Updates to the site are made every five minutes and the so-called "NORAD Tracks Santa" program has German, Spanish, French, Italian, Japanese and English links.
此网站每5分钟更新一次，这个所谓的“北美防空联合司令部追踪圣诞老人”项目有德语，西班牙语，法语，意大利语，日语和英语的链接。
Updates to the site are made every five minutes and the so-called "NORAD Tracks Santa" program has German, Spanish, French, Italian, Japanese and English links.
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