trajectory
noun [ C ] physics, military specialized uk/trəˈdʒek.tər.i/ us/trəˈdʒek.tɚ.i/
（射体在空中的）轨道，轨迹
the curved path that an object follows after it has been thrown or shot into the air
the trajectory of a bullet/missile 子弹／导弹的弹道
Idiom
be on an upward/downward trajectoryidiom 在上升／下降
to be getting higher or lower
The government is now claiming that inflation is on a downward trajectory. 政府现在宣称通货膨胀呈现下降趋势。