Our system has detected unauthorized access.

This academic paper is published as open access.

The accuracy of this experiment is very high.

He solved a large number of problems.

Understanding numbers is important for solving math problems.

He was bedridden with illness for several days.

I can't solve this problem because there are too many numbers.

The tracker dog was helpful in finding the fugitive.

She attended her friend's wedding wearing a semiformal kimono.

He is famous as a countertenor.