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There is no immediate need to raise the alert status for Indonesia's volatile Mount Merapi, despite magma moving higher inside the volcano, a leading vulcanologist said on Thursday. 一位主要的火山研究者周四表示，尽管岩浆在这座活跃的火山内逐渐升高，但目前并没有提高警戒层级的立即需要。
She is always on the alert for some new calamity. 她总是保持警觉以防某种新的灾难。
Keep on the alert; we're due for an inspection. 提防着点，轮到检查我们了。
Indicates the current status of the alert. 指示警报的当前状态。
They have put the army on the alert. 他们已使军队进入戒备状态。
The alert leopard went up to a deer quietly. 警觉的豹子静悄悄地走近一只鹿。
Troops are on the alert against any possible aggression. 军队戒备着可能的来犯。
Our military is on high alert status. 我们的军队处于高度戒备状态。
The US is not raising its terror alert status. 美国目前没有提高反恐警戒线。
Dogs are always on the alert wherever they go. 无论在什么地方，狗总是处于警觉状态。
They must be constantly on the alert for the enemy. 他们必须随时注意敌人。
To be careful or on the alert;take care. 戒备提防或戒备；注意
The alert listener will have noticed the err. 耳朵尖的人可以听出这个错误。
Secondly, designing the alert correlation model. 报警关联模型的设计。
Drivers must be on the alert for traffic signals. 司机必须注意交通信号。
Paying close attention; on the alert. 留心着；警惕着
Status, which specifies the current state of the alert. 状态:指定警告的当前状态。
In response to that announcement Tuesday, South Korea said it has strengthened its security level and alert status. 做为北韩宣布的回应，南韩星期二说提升自己的安全级别和警戒状态。
The city must be on the alert for being polluted. 城市要防止污染。
But we must remain on the alert. 但是我们现在仍然要保持警惕。