结实的螺丝和液压系统可以确保它在水上行驶。
According to screws and the hydraulic system this object could move on the water.
雪橇在雪原上轻巧地滑行，就象船在水上行驶一样。
The sledge slid across the snow as lightly as a boat on the water.
其实它最让人不可思议的是，如果遇到紧急情况，能够在地面，空中或水上行驶。
The most incredible thing in fact is, that it can move on the ground, on the surface of water and even in the air when something emergent happens.
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