tra·jec·to·ry /trəˈʤɛkt(ə)ri/
軌道,彈道,軌線
trajectory
軌跡 彈道
Tra·ject·o·ry n.; pl. Trajectories The curve which a body describes in space, as a planet or comet in its orbit, or stone thrown upward obliquely in the air.
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trajectory
n : the path followed by an object moving through space [syn: flight]