闸门是一种用来水流量的机械装置，通常用于河流、运河、水库或水电站等地方。它可以打开或关闭，以水位和水流速度，从而达到调节水量的目的。

How to read: [zhá mén]

Usage: 闸门 can be used as a noun in a sentence.

Example sentences:

1. The water level of the river was lowered by opening the sluice gate.

打开闸门后，河水的水位下降了。

2. The dam has several sluice gates to control the water flow into the reservoir.

这座大坝有几个闸门来水流进入水库。

3. The water level of the canal was regulated by adjusting the sluice gates.

通过调节闸门来调节运河的水位。

Synonyms and usage:

1. Floodgate - a type of sluice gate used to control flooding

2. Lock gate - a type of sluice gate used in canals to raise and lower boats

3. Barrier - a similar device used for controlling water or traffic flow

4. Valve - a mechanical device used for controlling fluid flow

Editor's summary:

闸门是一种用来水流量的机械装置，它可以打开或关闭，以调节水位和流速。它通常用于河流、运河、水库或者水电站等地方。除了作为一个名词使用外，它也可以被视为其他类似设备的同义词，如floodgate、lock gate、barrier和valve。