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Brown is an employee at the factory, and was involved in an argument with a colleague prior to the attack.

Brick-and-mortar bookstores have faced challenges from e-commerce for a long time with their disadvantages in terms of pricing and convenience, and the epidemic has just worsened the situation, experts said.

Businesses will have to continue to deal with the ongoing uncertainty, which is likely to continue to weigh on investment and trade.

Built on Baidu's ecosystem of information and services, DuerOS, as one of the leading applications of AI technology, delivers comprehensive solutions by allowing users to command and converse with their devices using natural language.

But Bezos says that it’s encouraged to have ideas and opinions that contradict what you said yesterday.