Line spectra are used to identify elements in a sample.

The document contains multiple end lines.

The ends of the line were crowded with people waiting for the bus.

The ends of the lines were frayed and worn.

The art gallery displayed many fancy lines.

The fault-lines in the region are constantly shifting.

The field lines indicate the direction of the magnetic field.

The soldiers stood in the firing lines, ready to engage the enemy.

The baseball field is marked with foul lines.

The forward lines scored three goals in the game.