tropic

n. /ˈtrɑːpɪk/ B2

回归线；热带

One of two imaginary lines around the Earth.

仙境例句

On the King's globe, a tropic ran round the warm middle of the world like a red ribbon.

国王的地球仪上，一条回归线像红丝带一样，绕着世界温暖的中部转了一圈。