n.几何；几何学
Today we have a lesson in geometry. 今天，我们有一节几何课。
Leon didn't finish his geometry homework because his mind kept jumping the track to think about the new girl in class. 利昂没完成几何作业，因为他思想总在开小差，想着班上新来的女生。
The boy puzzled his way through geometry. 那男孩煞费苦心地钻研几何学。
