He is a master of kunai technique, and no one can imitate his skills.

He was diagnosed with asplenia.

He accidentally held her hand.

He attacked the enemy's position using a recoilless rifle.

He deeply sympathizes with the principles of anarchism.

They chose unconditional surrender.

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.