词汇讲解：
1. vaccine n. 疫苗;痘苗
例句：She takes a vaccine against influenza every fall.
她每年秋季接种流感疫苗。
2. boost vt. 促进, 改善, 激励
例句：We need a holiday to boost our spirits.
我们需要休假以激发士气。
3. note vt. 注意
例句：Please note that the movie starts at 7 o'clock.
请注意, 电影七点开映。
4. alien adj. 外国的, 外国人的
例句：Orange trees are alien to China.
橘子树是从外国传入中国的。
5. tolerance n. 宽容, 容忍；忍耐力
例句：Human beings have limited tolerance of noise.
人类对噪音的忍耐力有限。
6. vaccinate vt.给…接种疫苗
例句：Were you vaccinated against smallpox as a child?
你小时候打过天花疫苗吗？
7. inject vt.注射, 注入
例句：The doctor has injected him under the skin.
医生已给他皮下注射了一针。
8. decrease n. 减小, 降低
例句：There has been some decrease in imports.
进口货物有所减少。
9. diagnosis n. 诊断法; 诊断结论
例句：What was the doctor's diagnosis of your disease?
医生对你的病作出了什么诊断？
10. publish vt. 出版；公布; 刊载,刊登
例句：The editor says they cannot publish all the letters they received.
编辑说他们不可能刊登他们收到的所有的信函。
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