The severity of his illness was so serious that even the doctor was surprised.

I forgot the password, so I can't log in.

Where is the joint of this box?

I went shopping with my co-sister-in-law.

Water turning into ice is an example of a phase transition.

They were put in a situation of confrontation.

He is studying about Einstein's theory of relativity.

We are looking for new partnerships to strengthen our business contact.

This phase diagram shows the state of the substance.

This problem is equivalent to his ability.