entrance half-angle

例句：

1. 1. The restaurant has a large entrance leading to the main dining area.
   这家餐厅有一个宽敞的入口通向主用餐区。
2. 2.The new building's entrance is adorned with colorful flowers.
   这座新建筑的入口装饰着五颜六色的花朵。
3. 3.The museum's entrance is free for children under 18 years old.
   博物馆对18岁以下儿童免费开放。