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Dominos expects to sell 12 million pizzas on game day (five times more than the ordinary Sunday) and its recruiting Alexa to help meet that goal.

Ding Hongchao, associate professor at Guangzhou Panyu Polytechnic, pointed out that cross-border e-commerce will soon become the major form of international trade, and small stall keepers must adapt themselves to the trend.

Domestic airlines in China rolled out ticket discount packages under the banner of "fly at will" one after another recently, in the hope of recouping money and boosting consumption affected by COVID-19 outbreak.

Developed nations pledged to provide 0 billion to help poorer countries tackle climate change, but the widening financing gap due to the US withdrawal has yet to be filled by other developed nations.

Dinosaur footprints are normally protected and require ventilation and drainage. Digital models are often made, which allow the footprints to be recreated using 3-D printers in case they later suffer damage, Xing said.