Light adaptation is the process by which the eyes adjust to changes in brightness.

It is important to adhere to the rules and regulations.

I will give an opening address at the conference.

To add insult to injury, he lost his job and then his car broke down.

The President delivered the State of the Union address last night.

The numbers add up perfectly.

The government is taking action to address human rights abuse in the country.

Additional Paid-In Capital is the amount of money that shareholders contribute to a company in excess of the par value of the shares.

Please enclose a self-addressed envelope with your letter.

He resorted to ad hominem attacks instead of addressing the issue.