on alert,on the alert
这两个短语形似义近，它们的区别是：
on alert是针对危险情况的，意思是“防备着”；on the alert是针对事态发展的，意思是“随时准备着”。
- 词义辨析
- 双语例句
1、
The 23-year-old's screams alerted a passerby who went to her rescue.
那个23岁女孩的尖叫引来了一位过路人前去营救。
柯林斯例句
2、
Communities downstream have been alerted.
下游的社区已经接到了预警。
柯林斯例句
3、
The coastguard was alerted.
海岸警卫队已接到报警。
《牛津高阶英汉双解词典》
4、
The boss alerted him that thief might come out at night.
老板要他提防夜里可能有贼.
《简明英汉词典》
5、
The voice of the caller alerted her.
呼唤者的声音使她警觉起来.
《简明英汉词典》
6、
The operator is alerted to this situation by blinking front - panel indicators.
面板上的指示器将出现闪光,对操作者发出出现这种情况的警告.
辞典例句
7、
The New Orleans police would by now be alerted.
新奥尔良的警察现在可能已处于待命状态.
辞典例句
8、
Had Walden alerted the police yet ?
沃尔登通知警察了 吗 ?
辞典例句
9、
You asked to be alerted when this item is changed.
您要求当此项目被更改后收到通知.
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10、
The doctor alerted me to the danger of a heart attack.
医生提醒我注意心脏病发作的危险.
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11、
The coast guard alerted the town to the coming hurricane.
海岸警备队令市民警觉即将来临的飓风.
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12、
The manager alerted the staff to the crisis facing the company.
经理让员工注意公司所面临的危机.
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13、
They had been alerted to the possibility of further price rises.
有人已提醒他们注意物价可能会再涨.
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14、
Our other allies around the world have also been alerted.
我们在全世界的其他盟国也已接获警报.
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15、
Alarmed by the frantic calls , the school alerted police, who arrested Amero.
被这通疯狂的警告电话吓坏了的校方只好报警, 警方逮捕了艾美萝.
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