These experts are especially concerned that new patterns of air movement in the Arctic could disrupt the Northern Hemisphere's jet streams - which are apparently weakening and moving northward.
这些专家尤其关注北极的空气流动的新模式可能会扰乱北半球的急流——很明显的是，这种气流正在削弱并向北方移动。
You can land on an airstrip with various approach patterns, depending on air traffic control guidelines due to weather, traffic density, wind speed, and so on.
您可以使用各种各样的方法模式在飞机跑道上降落，这取决于由天气、交通密度、风速等等因素决定的空中交通控制指导。
Image: patterns of air movement caused by a flying locust (middle and right columns) are similar to air patterns predicted by a computer simulation (left column).
图片说明：飞行蝗虫引起的空气流动模式(中间一列和右面一列)与计算机仿真预言的空气模式(左面一列)是相似的。
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