This is the 2531st most frequent Chinese word.
火车
Train.
The word '火车' is used as the subject of the sentence, referring to a physical train in motion.
火车正在进入车站。
The train is entering the station.
Here, '火车' is used as part of the phrase '坐火车', which means 'to travel by train'.
我喜欢坐火车旅行。
I like traveling by train.
In this sentence, '火车' is used to specify the type of transportation being discussed and compared.