The use of bioweapons is prohibited by international law.

My biological clock is disrupted, and I've been having sleepless nights.

I love biology.

I am majoring in biology at university.

He is a world-renowned biologist.

She described the pain of a broken heart as tears.

He emphasized his belief by saying, 'I believe in order to understand.'

I don't know a thing about him.

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.

This is an unprecedented crisis.