large span shallow tunnel

• 大跨径隧道

large span shallow tunnel的用法和样例：

例句

1. The double-curved arch bridge is a bridge type for medium and small span.
   钢筋混凝土双曲拱桥是中小跨径常用的拱桥形式。
2. Most wings have a different chord at different positions along their span.
   大多数机翼在他们跨径的不同位置有着不同翼弦长度。