They discovered that animals living in the enriched environment had higher levels of a protein called brain-derived neurotrophic factor ( bdnf ) .

他们发现生活在复杂环境下的小白鼠有一种名叫脑源性神经营养因子（bdnf）的蛋白质水平较高。

One such chemical is brain-derived neurotrophic factor ( bdnf ) a molecule that promotes the growth and survival of brain cells as well as communication between them .

有一种这样的化学物质，叫做脑源性神经营养因子（bdnf），这种分子能够促进大脑细胞的生长和存活，以及促进它们之间的沟通。

Research has shown that exercise can increase levels of a substance called brain-derived neurotrophic factor ( bdnf ) , which encourages growth , communication and survival of neurons .

研究表明运动能够增加一种叫做脑源性神经营养因子的物质（bdnf）的水平，这种物质可以激励神经元的生长，增加联通和生存率。

Other scientists have found that , in mammals , exercise also boosts the production of brain-derived neurotrophic factor ( bdnf ) , a substance that supports the growth and maintenance of brain cells .

其他的科学家发现，在哺乳动物中，运动也会提高脑源性神经营养因子（bdnf），这是一种援助和维持脑细胞生长的物质。

His studies show that alternate-day fasting , with a single meal of about 600 calories on the fast day , can boost the production of a protein called brain-derived neurotrophic factor by 50 to 400 per cent , depending on the brain region .

他的研究表明，隔日禁食，禁食日只吃600卡一餐，可以促进产生一种称为脑源性神经营养因子的蛋白质，根据大脑部位的不同，增幅为50-400%。