He began to reconstruct the events of December 21, 1988, when flight 103 disappeared.

他开始重现1988年12月21日103航班失踪时所发生的事情。

《柯林斯英汉双解大词典》

The trip is scheduled to start on December 21 in New York City and continue on to Milan, Prague, Paris, Bangkok and New Delhi before ending in Toronto on January 8.

这次旅行计划于12月21日在纽约开始，然后继续前往米兰、布拉格、巴黎、曼谷和新德里，1月8日在多伦多结束。

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The answer is nearly four centuries ago - December 21, 1638.

答案是近4个世纪以前——1638年12月21日。

youdao

The decision to release him early from prison elicited a firestorm of condemnation from many American family members of victims of Pan Am flight 103, which blew up over Lockerbie on December 21,1988.

VOA: standard.2009.08.21

Some people believe the Mayan Calendar is forecasting Armageddon to start on December 21, 2012.

FORBES: Look out! 'Tis the Season for Predictions

The consumer electronics retailer has also begun promoting free online shipping on purchases made through December 21.

FORBES: Retailers Roll Out Gimmicks to Lure Holiday Shoppers

These are timely questions because December 21, 2012 is the day that time is scheduled to end.

FORBES: Resolute About Resolutions