“People were dying and we didn’t know why,” Cornman told me. “We didn’t understand the physics of why the planes were crashing.” The deadly gusts were thought to be blowing in from the ocean or from thunderstorms outside the airports. But the danger turned out to be right above them. In the late seventies, researchers at NCAR and the University of Chicago discovered that the crashes were caused by microbursts—sudden, violent downdrafts. In a microburst, a storm cloud dumps cool air and rain straight down, like water from a broken awning. The air spreads horizontally after it lands, so the pilot thinks he’s flying into a headwind at first. He lifts the plane’s nose slightly and decreases the engines’ thrust. Then the downdraft hits, followed by a vicious tailwind, sending the aircraft to the ground.
Spoiler warning: This article reveals details from upcoming episodes of Hollyoaks.
，这一点在搜狗输入法下载中也有详细论述
Look, robot beaver Avatar is already a bizarro concept. But Chong and Andrews take it to wild new heights in the film's third act, which is chaos incarnate. No spoilers, but a sweet-spoken shark named Diane (voiced by Vanessa Bayer) and the Insect Queen's tyrannical spawn Titus (voiced by Dave Franco) get involved, each in ways that are equal parts hilarious and unsettling. I could not stop thinking, "I'm obsessed that I'm seeing this in a Pixar movie."
A monthly periodical featuring non-technical summaries of research on topics of broad public interest.
这意味着，行业劳动力正从提供标准化讲解的“流水线工人”，向提供个性化服务的“旅行策划师”升级，这是产业价值提升最坚实的微观基础。