The erector spinae is an important muscle for keeping the back straight.

He was working on that project round the clock.

We enjoy picnicking in this park year-round.

He is working round the clock.

His shots are always on target.

He is suffering from muscle pain in his middle scalene muscle.

The middle pharyngeal constrictor is an important muscle that helps with swallowing.

He is exactly in the state of 'A frog in a well does not know the vast ocean.'

He was swimming freely as if he was a fish playing in the pot.

The single point of red in the sea of green in the park was her red dress.