His talk was completely nonsense.

This discussion is completely meaningless.

His meaningful gaze made me uneasy.

He is majoring in semantics at university.

His words were profound, which made me think.

Natural language understanding is an important field of artificial intelligence.

He likes to take a walk in the park at dusk.

We should always remember the power of Kannon in difficult times.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.