entrance cone

例句：

1. 1. The entrance cone is designed to guide visitors through the tunnel.
   入口圆锥设计用来引导游客穿过隧道。
2. 2.The entrance cone is made of a material that is both strong and durable.
   入口圆锥由一种既坚固又耐用的材料制成。
3. 3. The entrance cone is often used in architectural designs to create a sense of height and depth.
   入口圆锥常用于建筑设计方案中，以创造高度和深度的感觉。