名詞 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
   同義詞：sluicegate, sluice valve, penstock, head gate, water gate

flood.gate

n.（名詞）
A gate used to control the flow of a body of water.Also called water gate
防洪閘門：控制水體流量的門也作 water gate
Something that restrains a flood or an outpouring:
閘門，出口：控制住大量擴散的事物或傾瀉的東西：
例句：
a ruling that opened the floodgates to refugees seeking asylum.
一條打開了難民們尋找避難所大門的法令