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Coaches, parents, players, fans and Trump had urged that the games be held. The president also offered federal aid. He greeted the announcement as "great news" and declared on Twitter that it was "my great honor to have helped!!!" It wasn't immediately clear whether the Big Ten accepted any of his offers of assistance.

Compared with the young, who are tied up with study, and middle-aged people with heavy workloads, the elderly have more free time and a stronger demand fill up that time -- and this is a group that at one time didn't use the internet, but now has unlimited potential.

Compared with last year, the PM2.5 density in Tianjin on the Lunar New Year's Eve dropped 54.2 percent, according to data from the municipal bureau of environmental protection.

Coalbed methane (CBM) is a form of natural gas extracted from coal beds.

Colombia