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But regarding the larger ideas and verticals — a.k.a. “one-way doors” — that change the direction of the company, Bezos prides himself on playing “chief slowdown officer.” He’s looking for three things. First, originality. “We have to have a differentiated idea. It can’t be a ‘me too’ offering,” he says. Second, scale. “We’re gifted with some very large businesses we’ve built over time, and we can’t afford to put our energies into something that if it works, it’s still going to be small.” And, finally, a Silicon Valley-worthy ROI. “Even at substantial scale, it has to have good returns on capital.”

But it’s not clear how the “emulation” described in the blog post will actually work in practice, and it’s also not clear how new MongoDB features introduced after the creation of the SSPL will flow into future versions of DocumentDB. For now, MongoDB users can find a list of features supported in DocumentDB here.

But he warned that a new vaccine may not provide long-term immunity.

But facts are more eloquent than words. During his first year in office, Trump has announced the withdrawal of the US from the Paris climate accord and the United Nations Educational, Scientific and Cultural Organization. He has also cut funding to the United Nations and threatened to kill the Iran nuclear deal. The US president has defied the strong global will against recognizing Jerusalem as the capital of Israel.

But now they will need to be more vigilant, at least in Guangzhou, Guangdong province, as traffic police have introduced new measures to deal with pedestrian violations.