1. Carelessness is the cause of his failure.
   粗心是他失败的原因。
2. Unhappiness is the root cause of his illness.
   不开心是他生病的根源。
3. Impure drinking water is a cause of disease.
   不洁的饮用水是引发疾病的一个原因。
4. The latter two eponymic lesions have specific causes.
   最后两个以人名命名的病变有其特殊的原因。
5. Brain lesions can be caused by bacterial infections.
   大脑损伤可能由细菌感染引起。
6. Drinking is a principal cause of highway deaths.
   酗酒是公路死亡事故的最主要的原因。
7. He took up the cause with evangelical fervor.
   他以传道者般的热情投身于这一事业。
8. I don't know the cause of his abrupt leave.
   我不知道他突然离去的原因。
9. The tax increases will, in the aggregate, cause much hardship.
   增加税收归结起来造成很多困难。
10. A benign tumour will not cause you any fatal harm.
    良性肿瘤不会对你有致命的伤害。
11. People hate those who unwittingly harm the cause of peace.
    人们痛恨那些在不知不觉中危害和平事业的人。
12. We surmised that the delay was caused by some accident.
    我们推测迟延是由某种事故所致。
13. The teacher tried to analyse the cause of our failure.
    教师设法仔细分析我们失败的原因。
14. S-and such results will follow from such and such causes.
    有如此这般原因就有如此这般的结果。
15. Roughness of the skin can be caused by bad diet.
    饮食不好可能引起皮肤粗糙。
16. He was determined to track down the cause of food spoilage.
    他决心查出食品腐烂的原因。
17. It transpired that the fire was caused by a careless smoker.
    据传这场大火是由一位粗心的吸烟者造成的。
18. The results show that both are caused by decarburization in heat tret-ment.
    结果表明,两者均为热处理脱碳所引起。
19. In this case, the default event handler does not cause a postback.
    在这种情况下，默认的事件处理不造成传。
20. If the virus cannot replicate itself, it cannot cause illness.
    如果病毒不能变异，也就不能够诱发疾病了。

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