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As it often grows into dense mats that clog channels, China has listed it as one of its 100 most dangerous invasive species. In addition, water lettuce will also block the exchange of air, reducing oxygen in the water and killing fish. Large mats can also block light and alter underwater plant communities.

As of April, online food ordering and delivery services had been used 194 million times.

As of Tuesday, participating Chinese restaurants have made 14,470 lunch or dinner boxes and delivered them through Chowbus to 21 hospitals, police stations and mobile testing sites in the Seattle area.

As of 10 pm, the electricity and ventilation systems in the mine had been recovered, with rescuers repairing the underground lift systems.

As online sports apps take off, basketball players in pickup leagues, particularly in China's first- and second-tier cities, can now experience the LeBron James effect for the Cleveland Cavaliers.