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Below ground, though, tiny tubers form along its root system, and just one plant can produce several hundred to several thousand tubers during a single growing season. With its deep, spreading roots, it's not surprising that many people consider it to be a weed rather than a food source.

Besides, while Beijing, Shanghai and Guangzhou are way ahead in the operating mileage of urban rail transit, second-tier cities such as Chengdu, Hangzhou and Wuhan are racing to catch up with the former three cities in completed investment last year and rail under construction, said the news outlet Yicai citing the report on Thursday.

Bezos concludes the letter with a copy of his first shareholder letter, from 1997, and his traditional confirmation, in case there was any doubt: “It remains Day 1.”

Benny Spiewak, a partner at SPLaw, a law firm in Sao Paulo specializing in life sciences, said, "This Brazilian multipronged approach is necessary and appropriate.

Bellevue Square, located across Lake Washington from Seattle, matches the description of other locations where Amazon bookstores have landed. The mall features several high-end stores, including a recently opened Whole Foods chain that uses technology to improve grocery shopping.