open canal

• 明渠

open canal的用法和样例：

例句

1. Open Channel and Longitudinal Cofferdam Project Attributed to CGGC.
   承建的导流明渠和纵向围堰工程。
2. In order to make irrigation convenient, we have built an open ditch.
   为了方便农田灌溉，我们修了条明渠。