1、A sluice or gate used to control a flow of water
水閘門一種用于控制水流量的閘門

2、This is why I NEVER allow a dog to go through a door or gate before I do.
在狗的前面穿過門口或下樓梯是建立種群秩序的重要部分。

3、A sluice or gate used to control a flow of water.
水閘門一種用于控制水流量的閘門

4、valve or gate that controls rate of water flow through a sluice.
控制通過水閘的水速的閥門。

5、valve or gate that controls rate of water flow through a sluice
控制通過水閘的水速的閥門。

or gate翻譯