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| 91. | naval service at land bases. |
| 海军岸上的警戒任务。 |
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| 92. | sprinkler alarm valve water motor alarm |
| 报警阀水警铃 |
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| 93. | combination burglar alarm and fire alarm |
| 防火防盗复合报警器 |
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| 94. | Extremely observant;vigilant. |
| 非常机警的；警戒的 |
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| 95. | fire alarm system=fire-alarm system |
| 火灾警报系统 |
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| 96. | Police's vigilance was eventually rewarded. |
| 警方时时警戒终有所获。 |
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| 97. | guarded the house against intruders. To |
| 看守房子以警戒入侵者。 |
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| 98. | Police vigilance be eventually rewarded,eg when an arrest be make |
| 警方时时警戒终有所获 |
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| 99. | You'd better cover the road on either side. |
| 你们一边一个沿路警戒。 |
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| 100. | The sentry is on guard. |
| 那哨兵在担任警戒。 |
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