研究人员使树蛇从15米高的塔顶端飞行，过程中使用了4个摄影机拍摄蛇滑行的轨迹，以拍摄成三维立体图像。
They launched the snakes from the top of a 15-metre tower and used four video cameras to construct 3-D images of the animals’ trajectories.
研究人员使树蛇从15米高的塔顶端飞行，过程中使用了4个摄影机拍摄蛇滑行的轨迹，以拍摄成三维立体图像。
They launched the snakes from the top of a 15-metre tower and used four video cameras to construct 3-D images of the animals' trajectories.
对此提出一改进梯度方法，并计算了某型战斗机从亚音速三维转弯升高到超音速的最短时间飞行轨迹。
This article presents a modifying gradient method, and the fastest 3-D turning trajectory from subsonic to supersonic is calculated.
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