New Words：

biology [bai'ɔlədʒi] n. 生物学
biologist [bai'ɔlədʒist] n. 生物学家
biological [.baiə'lɔdʒikəl] adj. 生物的；生物学的

Sample Sentences：

Mary is a biologist. She studies biology.
Man is in the highest link of the biological chain.
We do interesting experiments in the Biology classes.
He studied chemistry and then switched to biology.

research [ˈriˌsɜrtʃ]
n.研究, 调查
v.研究, 调查

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