1. | Police warned the public to be on the alert for suspected terrorists. |
| 警方警告群众警惕涉嫌的恐怖分子。
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2. | The alert listener will have noticed the error. |
| 耳朵尖的人能听出这个错。
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3. | Although he's over eighty his mind is still remarkably alert . |
| 他虽已年逾八十,但头脑仍十分机敏。
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4. | The troops were placed on full alert . |
| 部队处于全面戒备状态。
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5. | They received the alert at 10 a. m. |
| 他们在上午10时得到警报。
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6. | What the reporter needs most is an alert mind. |
| 记者最需要的是敏捷的头脑。
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7. | They received the alert at 10 a.m. |
| 他们在上午10时得到警报。
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8. | The air-raid alert sounded at noon. |
| 正午时响起了空袭警报。
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9. | They were quiet during the alert . |
| 警戒期间他们很安静。
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10. | They were constantly on the alert not to be taken by surprise. |
| 他们一直处于警戒状态以防遭受突然袭击。
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