头顶的英文：
vertex

A forehand/backhand/overhead volley, ie in tennis
正手[反手/头顶]截击（网球的）

Above the man's head we see surveillance cameras
我们在这个人的头顶上方看到了监控摄像头

ugh! Chih-sheng, did you see that horse brush past Su-su's head, and almost knock her over and trample on her?
喔，喔，喔，——芝生，你看见马头从素的头顶擦过，险一些踏倒了她么？

The sky arches overhead.
天空弯弯罩在头顶。

(as)bald as a coot completely bald
头顶全秃的.

The wild geese sailed overhead.
大雁在头顶上空飞过。

A plane hummed overhead.
一架飞机在头顶嗡嗡响。

Two hawks were hovering overhead.
两只鹰在头顶盘旋。

He lifted his hands above his head.
他将双手举过头顶。

Do you want me to thin out the top?
要头顶打薄吗？

Every edge connects a vertex labeled 3 with a vertex labeled 4
每一条线都联结一个标上3和一个标上4的顶点。

A line that joins a vertex of a triangle to the midpoint of the opposite side.
中线从三角形顶点到对边中点的直线

Either of the two parts into which a cone is divided by the vertex.
锥顶片位于锥顶两边而形成一个锥体的两片中的一片

The vertex of the angle created by the intersection of rails in a frog or switch.
辙叉角在岔心或岔道上，由铁轨交叉而成的角的顶点

A point equidistant from the vertexes of a regular polygon.
中心点，中枢与一正多边形各角顶点等距的一点