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"First is social distancing. It's encouraged to keep a safe distance from other people in the group," it said. "Temperature checks and wearing masks are also necessary to ensure safe travel."

"Guacamole has become a tradition in the US. Just like the ubiquitous pizza, they don't think it's Italian food anymore－they think it's their food," Medina says.

"From climate change to halting the spread of nuclear weapons, to fighting global terrorism, to finding cures for some of the most dreaded diseases in the world, the world is looking for leadership from both the United States and China working together hand in hand," he said.

"Generating a false positive for HIV is entirely unexpected for this vaccine but underscores the critical necessity of testing the safety of newly developed vaccines in large numbers of volunteers," Palmer said.

"Hackers can attack the intelligent connected vehicles and control the braking systems through cellular network, Bluetooth and CD player," Miller said. "To secure automated vehicles, we should find the law of hacking. And based on the law, we stand a chance in developing protective methods," Miller noted.