The teacher used an analogy between a heart and a pump to explain how the circulatory system works.

Remember to take your full course of antibiotics.

The human body produces an antibody to fight off the virus.

The detailed data analysis can be found in the appendix of this report.

His great performance drew thundering applause from the audience.

You have the arbitrary power to make decisions.

The earth rotates on its axis.

The shelf is supported by brackets.

The coefficient of friction determines how much two surfaces will slide against each other.

Spain is a composite of diverse traditions and people.