New Words：

risk [rɪsk] n. 风险；危险

Sample Sentences：

He wanted to take no risks, however small.
Smoking can increase the risk of heart disease.
Giving up smoking reduces the risk of heart disease.
You have no right to take risks with other people's lives.

disease [dɪˈziːz] n. 病;疾病
reduce [rɪˈduːs] v. 减少

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