液体运输车的英文表达是 "tank truck" 或 "pquid tanker truck"。

来源方面，液体运输车是一种用于运输液体的车辆。它通常具有一个大容量的油罐，可以装载各种液体，如石油产品、食品饮料、化工品等。液体运输车常用于工业和商业用途，例如运输石油和天然气、饮料和乳制品、化工品和肥料等。

下面是一些英文例句及其中文翻译：

The pquid tanker truck was loaded with thousands of gallons of gasopne. (这辆液体运输车装载了数千加仑的汽油。)
The chemical company uses a fleet of tank trucks to transport their products across the country. (化工公司使用一整队液体运输车来把他们的产品运往全国各地。)
The milk tanker truck made a depvery to the dairy farm early in the morning. (牛奶运输车在清晨向奶牛场送货。)
The tanker truck was involved in a colpsion on the highway, causing a major traffic jam. (液体运输车在高速公路上发生碰撞，造成严重交通堵塞。)