HSK 6
Réntǐ dànǎo zhōng yuē yǒu bābǎiliùshí yì gè shénjīng xìbāo.
The human brain has approximately 86 billion nerve cells.
HSK 6
Shénjīng xìbāo sǔnshāng hòu hěn nán zàishēng.
Nerve cells are difficult to regenerate after damage.
HSK 6
Kēxuéjiā zhèngzài yánjiū rúhé bǎohù shénjīng xìbāo.
Scientists are studying how to protect nerve cells.
