water cannons

基本解释

I told them that I thought the use of water cannons was prohibited in the USA, and they were astonished.
我告诉他们，我想使用水炮被禁止在美国，他们感到惊讶。
South Korean police have fired water cannons and arrested more than 200 people who were protesting against plans to resume US beef imports.
韩国警方发射高压水枪，并拘捕超过200名抗议计划恢复美国牛肉进口的人。
blog.sina.com.cn
Wildlife workers are also firing loud cannons to "haze" birds from the water's edge.
野生动物工作者则发射声音很大的炮弹来把鸟从水边轰开。

Police responded by using tear gas, water cannons, baton charges and rubber bullets to disperse the crowd.

He has used spoiled pie filling, fired from water cannons, as a weapon at sea.
NEWYORKER: Neptune’s Navy
The whaling ship blasted its horns and turned on its water cannons, which sent powerful jets overboard.
NEWYORKER: Neptune’s Navy