今天我们要学的词是alert。 Alert, 警戒，警报。 The National Weather Service put the area under a tornado alert until 7 o'clock tonight, 国家气象局对本地发布龙卷风警告，晚上七点钟解除。 The police sent out a crim...
Scientists Seek Earthquake Warning Signs for Short-Term Alerts 科学家通过短期预警寻求地震警报信号 The massive recent earthquakes off Indonesia might not have killed so many if they co...
