A life has, we might say, a trajectory.(我們不妨這么說，人生就是軌跡線，密度由時間構成。)

Might Lewis be on a similar trajectory?(也許劉易斯也是類似的情形？)

My career seemed to be on a downward trajectory.(我的事業似乎在走下坡路。)

But most of all it was the extraordinary trajectory of his life.(但最重要的是，這是他非凡的人生軌跡。)

He has no agency in this trajectory he's entering upon.(在他正跨入的軌跡中他沒有任何代理。)

The direction is tangent to the trajectory.(方向就是軌道的切線方向。)

So, this is part of a larger intellectual trajectory.(所以，這是一條大的智慧軌道中的一部分。)

Class trajectory is almost set before they get to school.(階級軌道在他們上學之前就已經定下來了。)

So, think of a line as the trajectory of a moving point.(把直線看作運動點的軌跡。)

At the moment they are clearly on an upward trajectory.(此刻他們顯然呈上升趨勢。)