我们得到一条在一个方向上向下，而在另一个方向上向上的抛物线。

We have a parabola going downwards in one direction, and upwards in the other one.

youdao

我们可以画出这样的开口向下的抛物线。

So, we should draw maybe this downward parabola.

youdao

建筑物采用了倾斜的抛物线屋顶。

Upswept roofs and parabolas cropped up on buildings.

youdao

That's correct. So her answer was, if it was a full parabola, then we know it would've been at the ground before I set my clock to 0.

她说,如果运动轨迹为一条完整的抛物线,那么它在我们所设定的零时刻之前,就已经落地了

耶鲁公开课 - 基础物理课程节选