Both are high-speed trains regardless of whether they are in motion or not.
High-speed is a descriptor of the type of train, not their current speed.
Just like a racing cars is still such even when stationary.
High-speed is a descriptor of the type of train, not their current speed.
Just like a racing cars is still such even when stationary.
"High-speed" is ambiguous. It can be used to describe the class of vehicle, or it can be used to describe the state of motion of the vehicle.
I saw a discussion thread the other day about the word for a pile of blankets and pillows at a kids sleepover. Every Southerner knew the term “pallet”. Pretty much everyone else didn’t have a word for it at all, other than a “pile”.