The soldiers formed a strong line of battle.

The quarterback took a step back behind the line of scrimmage.

The sniper adjusted his line of sight before taking the shot.

The students line up in the hallway before class.

The color line refers to the discrimination between white and black people.

The contour lines on the map indicate the elevation of the land.

The assembly line is an efficient method of production.

The soldiers formed a battle line and prepared for the attack.

The bottom line of the income statement shows the company's net profit.

The bottom-line of the financial statement shows the final profit or loss.