Step1: 听单词讲解音频并跟读，熟悉它们的发音和意思

scr‘utiny 仔细审查v

’hormone 激素n

secr‘ete 分泌v

’rodent 啮齿类动物n

aer‘obic 有氧的a， anaer’obic无氧的

cultured bone cell 培养骨细胞， in culture培养

’regulator调节器n

‘magnitude 幅度n

in terms of 关于

’osteocytes 骨细胞

scler‘ostin 骨硬化蛋白

counterintuitive 反直觉的a

skeletal renovation 骨骼修复

derive from 从...中获取

’dotage 年老n

Step2: 听音频，用简洁的文字回答下面的题目

1. What can hormone irisin do to human bodies?

2. What did scintists find about irisin in a lab? (2 points)

3. What is the fucntion of the sclerostin

4. What seems to be counterintutive to researchers?

5. What is the irisin extra value to neuroscience?

Step2: 关注微信公众号“顶萃英语”，回复关键词“高阶22”，可获取参考答案。