My grandfather contracted poliomyelitis when he was young.

I drew water from the well.

He is a salary thief, contributing nothing to the company.

A terrestrial planet may have an environment similar to Earth.

The Riemann sum is a method for approximately calculating the integral of a function.

In 2003, Severe Acute Respiratory Syndrome (SARS) spread all over the world.

I bought apples and bananas.

The center of this plate is sunken.

Please teach me how to calculate the area of this circular sector.

He felt nauseous and rushed to the toilet.