风是由热空气上升产生真空而引起的空气流动。
Wind is a current of air caused by a vacuum caused by hot air rising.
一个新的研究表明它们飞得很快并全靠自己产生的气流，没有那预想中的上升气流帮它们提升到天空般的高度。
A new study shows that they do it quickly and under their own steam, without the help of upslope tailwinds thought to loft them over the sky-high peaks.
热空气上升，冷空气补充取代之，就产生了对流气流。
As warm air rises cool air is drawn in to replace it creating a convection current.
冷暖气流在切变线南侧、低空急流左侧交汇，产生强烈辐合上升运动，触发了强降水。
The cold and warm currents meet at the southern side of the shear line and the left side of the low-level jet stream to produce an upward movement of intensive convergence and trigger the rainstorm.
建筑热外表面可产生诱导上升热气流。
The rising of induced airflow on the building's heated external surface has been examined.
沿船舷上升的气流以及与顺着船只航行方向流动的气流产生的足够浮力和前进力，托住信天翁的巨大翅膀使之飞翔。
The currents of air that the walls of the ship direct upwards, as well as in the line of its course are enough to give the great bird with its immense wings sufficient sustenance and progress.
沿船舷上升的气流以及与顺着船只航行方向流动的气流产生的足够浮力和前进力，托住信天翁的巨大翅膀使之飞翔。
The currents of air that the walls of the ship direct upwards, as well as in the line of its course are enough to give the great bird with its immense wings sufficient sustenance and progress.
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