VOA慢速英语:New Study Suggests that Aspirin Sharply Reduces Bowel Cancer Risk

词汇讲解：

1. 流血 vi.流血
例句：If you cut your finger, it will bleed.
如果你割破手指, 它会流血。

2. chew v. 咀嚼; 咬
例句：Don't bite off more than you can chew.
不要贪多嚼不烂。

3. block vt.堵塞, 阻塞；阻碍, 妨碍
例句：A snowdrift blocked his path.
雪堆阻碍他的去路。

4. release vt.释放; 放开；发布; 发行; 发售
例句：The commission released its findings.
委员会公布了调查结果。

5. observe v. 观察; 研究; 看到; 注意到
例句：We observed that it had turned cloudy.
我们注意到天已经变阴了。

6. request n. 要求, 请求；所请求的事物
例句：The teachers were deaf to our requests.
老师对我们的请求一点都听不进去。

7. substitute adj. 代替的;代用的;替补的
例句：The new substitute sweetener is made from a wild plant.
这一新的代用甜味剂是用一种野生植物制成的。

8. enlarge v. 扩大, 扩展, 扩充；放大
例句：The balloon enlarged as we pumped air into it.
那个气球充气后就变大了。

9. survival n.幸存, 生存；残存的人[物]; 遗物; 遗风
例句：We all have a strong survival instinct.
每个人都有强烈的求生本能。

10. confirm vt. 证实, 证明; 肯定, 确认
例句：We have confirmed the report.
我们证实了那则报道。

11. disorder n. (身心、机能)失调,紊乱；不适；疾病
例句：He's suffering from severe mental disorder.
他患有严重的精神病。