The mail trains arrived at the station on time.

The mule trains carried supplies to the remote mountain village.

The pack-trains carried supplies to the remote mountain village.

The rail trains are running on time.

The railway trains arrived at the station on time.

Snow trains are a common sight in the winter.

The spike trains of the neurons were recorded during the experiment.

The tidal trains are a common sight along the coast.

There are many different trains of thinking on this issue.

The valve trains in modern engines are designed for optimal performance.