My grandfather contracted poliomyelitis when he was young.

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

A terrestrial planet may have an environment similar to Earth.

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

Kei's birthday party was filled with everyone's jubilation.

He and I compete in tennis every week.

The tachometer of my car has broken.

He was appointed as the chief executive officer of the company.

He is an expert in computational linguistics and is involved in the development of artificial intelligence.

Computational linguistics is the study of analyzing human language with computers.