一旦进行空运，包裹的垂直降落轨道将由一个或多个“操纵面”进行控制，包括机翼、降落伞或压缩的空气罐。

Once airborne, the vertical descent path of the package would be controlled using one or more "control surfaces" - which could consist of wings, parachutes, or compressed air canisters.

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无人驾驶自由气球，是指无动力驱动、无人操纵、轻于空气、总质量大于4千克自由漂移的充气物体。

An unmanned free balloon shall refer to a freely drifting inflatable object which is driven with no power, is piloted by nobody, is lighter than air, and whose gross mass is more than 4 kilograms.

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在详细的考虑转向机构、前后空气悬架、车身等部件的基础上，利用ADAMS/VIEW软件建立了某中型客车的操纵稳定性多体模型。

A handling simulation multibody model of a midibus is built using ADAMS/VIEW after we consider the steer system, front and rear air suspension.

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