aturen

In a sentence

• Els vehicles s'aturen quan el semàfor es posa vermell.

  Vehicles stop when the traffic light turns red.

  'Aturen' in this sentence is used to mean 'stop' in the context of vehicles responding to a traffic control signal.

• Les obres s'aturen mentre esperen els nous materials.

  The construction works are paused while waiting for new materials.

  Here 'aturen' indicates that a process is halted or paused because of external factors.

• Els alumnes s'aturen per escoltar el professor.

  The students pause to listen to the teacher.

  In this case, 'aturen' suggests taking a moment to pause an action in order to pay attention to something else.