floodgate

名词 floodgate:

1. something that restrains a flood or outpouring
2. regulator consisting of a valve or gate that controls the rate of water flow through a sluice
   同义词：sluicegate, sluice valve, penstock, head gate, water gate

flood.gate

n.（名词）
A gate used to control the flow of a body of water.Also called water gate
防洪闸门：控制水体流量的门也作 water gate
Something that restrains a flood or an outpouring:
闸门，出口：控制住大量扩散的事物或倾泻的东西：
例句：
a ruling that opened the floodgates to refugees seeking asylum.
一条打开了难民们寻找避难所大门的法令