semicircular glass block

例句：

1. 1. The car is designed with a semicircular windshield.
   这辆车设计有半圆形的前挡风玻璃。
2. 2. The bridge is built in a semicircular shape.
   这座桥是半圆形的。
3. 3.The octagonal room has a semicircular window.
   八角形的房间有一个半圆形的窗户。