In chemistry class, I learned about the reactions of acid anhydrides.

The trolleybus is very convenient as a means of urban transportation.

He was left in a state of statelessness.

In our club, we conducted a secret ballot to choose a new leader.

He cannot enter into a legal contract as a person without legal capacity.

The opinions of the non-partisan layer greatly affect the election results.

Pterygota is a part of insects, characterized by having wings.

He was diagnosed with agranulocytosis.

World War I was a large-scale war that lasted from 1914 to 1918.

World War II lasted from 1939 to 1945.