He is proficient in calculating quadrature in astronomy.

He is struggling to understand the ablative case in Latin.

The sum of one angle of this triangle and its complementary angle is 90 degrees.

I have confirmed your reservation.

I have confirmed your reservation.

This containment vessel is very sturdy.

The data is stored in the computer's storage.

You can contain all the tools in this box.

He was isolated because of an infectious disease.

He is isolating at home due to an infectious disease.