| 41. | Work is more than a necessity for most human beings; it is the focus of their lives, the source of their identity and creativity. |
| 工作不仅是大多数人的需要；它是人们生活的焦点，是人的个性和创造性的源泉。
|
| 42. | These memoirs are a source book for historians. |
| 这些回忆录是史学家的资料书。
|
| 43. | The most common artificial light source is the incandescent bulb. |
| 最常用的人造光源是白炽灯。
|
| 44. | His source of joke will not go out. |
| 他的笑话层出不穷。
|
| 45. | We understand from an authoritative [are liable] source that…. |
| 我们从权威［可靠］方面获悉．．．。
|
| 46. | information from an authoritative source |
| 来自权威方面的消息
|
| 47. | be a reliable source of information (about sth) |
| 成为(某事物的)可靠信息来源
|
| 48. | a useful source of income for the charity |
| 用作慈善事业的能解决问题的收入来源
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| 49. | a machine with an integral power source |
| 有内置电源的机器
|
| 50. | a potential source of conflict |
| 可能引起冲突的根源
|