| 31. | Mum or dad, of course, provide a regular supply of pocket money, but uncles and ants are always a source of extra income. |
| 爸爸妈妈当然经常给孩子零花钱，但是，叔舅婶姨也是孩子们额外收入来源。
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| 32. | Car alarms constantly scream at us in the street and are a source of profound irritation. |
| 在街上，汽车的防盗警报不断对我们吼叫，这是人们极度烦燥的一个原因，
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| 33. | The noise pollution survey revealed a rather spurring and possibly amusing old fashioned source of noise. |
| 这个有关噪音的污染调查还揭示了一种出人意外而同时可能会引人意外而同时可能会引人发笑的老式噪音源。
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| 34. | Whatever the source of noise, one thing is certain: silence, it seems, has become a golden memory. |
| 不管噪声来自何方，有一点是肯定的：看来寂静已变成一种珍贵的回忆。
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| 35. | Refuse politely any cold drink from an unknown source . |
| 应谢绝任何不明来源的冷饮。
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| 36. | Even if a piped water supply is safe at its source , it is not always safe by the time it reaches the tap. |
| 即使管道供水系统在水源处安全的，等水到达龙头时就不一定总是安全的了。
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| 37. | Travellers on short trips to areas with water supplies of uncertain quality should avoid drinking tap-water, or untreated water from any other source . |
| 短途旅行到水质不保险的地区时，应避免饮用水龙头的水或未经处理任何其他来源的水。
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| 38. | For the majority of people, reading or learning a new skill has become the focus of their lives and the source of their happiness and contentment after their retirement. |
| 对大多数人来讲，退休以后，阅读或学习一项新技术已成为他们生活的中心和快乐的来源。
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| 39. | We should work be such a significant source of human satisfaction.A good share of the answer rest in the kind of pride that is stimulated by the job , by the activity of accomplishing. (Leonard R.Sayles, British writer) |
| 为什么工作竟然是人们获得满足的如此重要的源泉呢？最主要的答案就在于，工作和通过工作所取得的成就，能激起一种自豪感。(英国作家 塞尔斯.L.R.)
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| 40. | My wages are the principal source of my income. |
| 薪金是我收入的主要来源。
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