例句： The gas is stored under pressure in the tank.

例句： the dawn of history.

例句： You have lots of time to finish the work.

例句： Flying across the Atlantic for the first time was a great achievement.

例句： Now that's absolutely super!

例句： The director made his son start on the bottom rung of the ladder as an office boy.

例句： Each component is carefully checked before assembly.

例句： The book had two pages missing.

例句： They have to rely on the river for their water.

例句： This organization espouses the socialist philosophy.