trajectory
n 弹道；轨道（tra穿过+ject+ory→扔进去→弹道）
释义2：
trajectory
/ trE5dVektEri: /
◙ (pl. -ies)1. the path described by a projectile flying or an object moving under the action of given forces• （抛射体的）弹道，轨道，轨迹2. [Geometry] a curve or surface cutting a family of curves or surfaces at a constant angle• [几何] 常角轨道，轨线【语源】
1. late 17th cent.: from modern Latin trajectoria (feminine), from Latin traject- 'thrown across', from the verb traicere, from trans- 'across' + jacere 'to throw'
俄语/英语字母转换