The equilibrium length of this spring is 5 centimeters.

He prefers natural foods.

This wood may spontaneously combust if the humidity is high.

His car spontaneously combusted all of a sudden.

Natural rights are rights that humans have from birth.

Neurotransmitters are responsible for transmitting information between nerve cells.

Chemotransmitters play an important role in the transmission of information between nerve cells.

Sufficient caution is necessary when handling radioactive materials.

Natural language processing is a technology that allows computers to understand and analyze human language.

He is writing a thesis on abiogenesis.