What does drainage mean?

Interpretation of drainage [Water accumulation caused by excited rain] Detailed explanation of ground water accumulation (1). Rain accumulated on the ground. After a heavy rain, there was deep water on the roadside. (2) make water leak. When the vegetables are done, drain them. Interpretation of the word drain √ Liquid drops drop by drop: blood (blood is an oath of revenge). Work hard. Filtration: Drain the wine. Water drop: Li Yu. Drainage (metaphor for the essence of articles and speeches). Radical: beech; Water is a colorless, odorless and transparent liquid: rice. Water droplets will wear away stones. It's packed. River: Hanshui River. Sound water. Rivers, lakes and oceans. Reservoir. Water control When conditions are ripe, things will be completed smoothly. The knife cuts bread and fingers. Cross the mountains and rivers. Surrounded by mountains and waters. Fruit juice: ink pen. black