semicircle canal

例句：

1. 1. The construction of the new bridge required the installation of a semi-circular canal to facilitate traffic flow.
   新桥的建设需要安装一个半圆管来方便交通流。
2. 2. The engineer carefully designed the semi-circular canal to ensure it would not obstruct the water flow.
   工程师仔细设计了半圆管，以确保它不会阻碍水流。
3. 3. During the construction phase, the team worked diligently to ensure that the semi-circular canal was completed on time.
   在施工阶段，团队努力工作以确保半圆管按时完成。