| 51. | There has to be tight security at a prison. |
| 监狱必须有严格的保卫措施。
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| 52. | For security , the door was chained as well as locked. |
| 为了安全，房门上了锁之后加栓链条。
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| 53. | The instrumentalist played with great security . |
| 演奏家满有把握地演奏着。
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| 54. | A good fire is a security against wild beasts. |
| 生一对大伙可确保不受野兽侵扰。
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| 55. | Insurance is security against loss. |
| 保险可免遭损失。
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| 56. | Father was security for Mr. Johnson. |
| 父亲是约翰逊先生的保证人。
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| 57. | Is there any security from [against] H-bombs. |
| 有防御氢弹的保障吗。
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| 58. | It will greatly threaten the security of this country. |
| 它将会极大地威胁本国的安全。
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| 59. | lax security , behaviour, regulations |
| 不严谨的保安措施, 行为, 规则
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| 60. | lulled us into a false sense of security |
| 哄骗我们使我们以为很安全
|