It usually arises from a mother's narcissistic investment in a child's trajectory, a need to have a high-achieving child or one with a particular set of skills.

孩子的成长轨迹通常源自母亲的自恋，母亲要有一个高成就的，或拥有某种特定技能的孩子。

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Class trajectory is almost set before they get to school.

阶级轨道在他们上学之前就已经定下来了。

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Your trajectory is set, and you know exactly where you are going, and from that point of view things look good.

你的轨道已经安置好，你清楚地知道你要去哪里，从那一方面来说事情看来还不错。

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If that's all it knows, then in that scenario there is no building or anything else; it continues a trajectory both forward in time and backward in time, and it says that whatever seconds, one second before you set your clock to 0, it would've been on the ground.

如果是这样,在那种模式下,没有楼房或者别的什么,物体的运动轨迹可以沿时间可以向后延伸,也可以向前延伸,不管时间取什么值,在零点前一秒时,物体就在地面上

耶鲁公开课 - 基础物理课程节选

What happens after the elections in Europe and the U.S. will set the trajectory of the next decade, be it an era of recession or an economic rebirth.

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We are set on a trajectory of productivity and accomplishment, aiming less toward our vocation or calling more toward our occupation.

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Set against that trajectory, Mr Bush's proposals are extremely modest.

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