An oval or circular building with rows of seats rising around a central space.

圆形剧场(亦作椭圆形)。

The place of public games or contests.

竞技场。

Rows of seats arranged in a half-circle in an auditorium.

礼堂或剧场中排成半圆形阶梯式的座位。

A flat or gently sloping area surrounded by abrupt slopes.

盆地(四面被山包围的平坦地)。