名詞 drainage:

1. emptying something accomplished by allowing liquid to run out of it
   同義詞：drain

1. A long narrow trench or furrow dug in the ground, as for irrigation, drainage, or a boundary line.
   溝渠，排水溝，水道在地面上狹長的溝渠或細溝，用于灌溉、排水或用作分界線
2. He came to look at the drainage.
   他是來檢查排水設(shè)備的。
3. The city was even equipped with a drainage system, for a great many clay pipes were found beneath the narrow streets.
   這座城市甚至還敷設(shè)過排水系統(tǒng)，因為在窄窄的街道底下發(fā)現(xiàn)了許多陶土制的管道。
4. The drainage system has been aged.
   排水系統(tǒng)已經(jīng)老化了。

drain.age

n.（名詞）
The action or a method of draining.
排水：排水的行動或方法
A system of drains.
排水系統(tǒng)
Something that is drained off.
排走物：被排走的東西
Medicine The removal of fluid or purulent material from a wound or body cavity.
【醫(yī)學】 排除：傷口或體腔中液體或膿的排除