释义
v. 排水 n. 排水系统,污水
例句
1. The drainage system has been aged. 排水系统已经老化了。 2. The city was even equipped with a drainage system, for a great many clay pipes were found beneath the narrow streets. 这座城市甚至还敷设过排水系统,因为在窄窄的街道底下发现了许多陶土制的管道。