The direction is tangent to the trajectory.

方向就是轨道的切线方向。

youdao

That alone changed the trajectory of my success.

这改变了我成功的轨迹。

youdao

And, the line is the trajectory of a point as time varies.

这条直线可以看做是点随时间运动的轨迹。

youdao

"Today we can say with confidence and conviction that we have broken the trajectory of the AIDS pandemic."

VOA: special.2010.12.01

The second thing I want to say is less about paper writing, and more about the trajectory of this course and what we're seeing in common between these novels.

第二件我想说的事情是，不是关于写论文的，而是关于这门课的轨迹的,我们会在这些小说里看到一些共同点。

耶鲁公开课 - 1945年后的美国小说课程节选

First of all, as you can see by the trajectory here, it's very conjunct, right, all neighboring notes here.

首先,你可以通过这里的轨迹看到,这是明显的级进,全是相邻的音符

耶鲁公开课 - 聆听音乐课程节选

Palmisano knew the trajectory of his reign at IBM almost from the time he started.

FORBES: Sam Palmisano Kicks Himself Upstairs

The trajectory of new media has been toward social interaction and away from podiums and pedestals.

FORBES: Games Were Social Media Before It Was Cool

"The trajectory we are on just doesn't seem likely to reach artificial intelligence, " Och says.

FORBES: Magazine Article