Invertebrates are a type of creature without a skeleton.

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.

This road is a dead end, so we have to find another way.

What is that?

This problem is very difficult.