Turbulence is rarely that simple. It’s too scattered, too mercurial, too easily triggered by weather patterns that trigger other patterns in an endless cascade. “It’s not just one thing that’s going on,” Bob Sharman, an atmospheric scientist at NCAR, told me. “It’s not just atmospheric convection. It’s not just wind flowing over mountains. It’s everything going on all the time and interacting.” Sharman is one of the country’s preëminent authorities on turbulence prediction. The computer models that he has built can predict where rough air is most likely to arise. “The problem is,” he said, “when we go to meetings with the airline industry and suggest a probabilistic approach, a pilot will stand up and say, ‘No! I want you to tell me if there will be turbulence at this place, at this time.’ ” Sharman threw up his hands. “Nobody knows that. I understand that, in theory, you would want that. But, in practice, that is just not possible.”
What you can do to reduce carbon emissions，详情可参考Line官方版本下载
Великобритания собралась защитить свою военную базу от Ирана14:46，推荐阅读快连下载安装获取更多信息
蓋茨在今年2月受澳洲媒體9News訪問時表示，他與愛潑斯坦的互動僅限於一起用餐，而他對此感到後悔，「我為曾經這樣做而道歉」。
type NamedParam[N: str, T] = Param[N, T, Literal["keyword"]]