形容詞：機警的、敏捷的
常見搭配詞：
- be alert to
對…保持警覺
例句：You should be alert to any changes in the patient’s condition.
你應該對病人狀況的任何變化保持警覺。 - remain / keep / stay (mentally / physically) alert
保持(精神上/ 身體上)警覺
例句：Drivers should stay alert while driving in bad weather.
駕駛者在惡劣天氣下行駛時應保持警覺。 - be alert to danger
對危險保持警覺
例句：Wild animals are always alert to danger in their environment.
野生動物總是對其環境中的危險保持警覺。
例句：
- To keep alert during a long meeting, drink water and take short breaks.
在長時間的會議中保持警覺，可以喝水並休息片刻。 - A good night’s sleep can help you stay mentally alert during the day.
睡個好覺可以幫助您在白天保持精神警覺。 - Regular exercise can help you stay physically alert and energetic.
經常鍛煉可以幫助你保持身體警覺和充滿活力。 - The athlete’s quick and alert reflexes give him an advantage in the game.
運動員靈敏且警覺的反射能力使他在比賽中具有優勢。 - The police remained alert for any signs of trouble.
警方一直保持警惕，以防出現任何麻煩。 - The guards were alert and ready to respond to any threat.
守衛們保持警惕，隨時準備應對任何威脅。
同義詞：
- attentive 專注的、留心的 adj. 表示對某事物非常專心，並對周圍的事物保持高度關注。
例句：The student was attentive during the lecture.
學生上課時保持專注。 - vigilant 警惕的、警覺的 adj. 形容對潛在危險保持高度警覺並做好準備的狀態。
例句：We must be vigilant to protect our privacy online.
我們必須保持警惕，以保護我們的在網路上的隱私。 - watchful 密切注視的、警戒的 adj. 表示持續觀察並對潛在變化保持警惕。
例句：The security guard was watchful of any suspicious activity.
保全人員留意著任何可疑活動。 - observant 觀察敏銳的、注意力集中的 adj. 描述對周圍環境非常敏感，能迅速察覺變化的特質。
例句：She is very observant and quickly noticed the change in her friend’s behavior.
她觀察非常敏銳，很快就注意到了朋友行為上的變化。 - awake 清醒的、警覺的 adj. 形容心智清醒，對周圍事物保持警覺。
例句：He remained awake and focused during the long drive.
在漫長的開車過程中，他始終保持清醒和專注。
名詞：警報、警戒
常見搭配詞：
- issued a security / weather / medical / travel alert
發出安全 / 天氣 / 醫療 警報
例句：The company issued a security alert due to a potential cyber attack.
公司因潛在的網路攻擊可能性，發出了安全警報。 - on high alert
高度警戒
例句：The city is on high alert after receiving a bomb threat.
收到炸彈恐嚇後，這座城市處於高度警戒狀態。 - be on the alert for something
警惕尋找
例句：The farmer is always on the alert for any signs of disease in his crops.
農民對他的農作物的任何疾病跡象非常警覺。 - send out an emergency alert
發出緊急警報
例句：The authorities sent out an emergency alert to warn people of the approaching hurricane.
當局發出緊急警報，警告人們颶風即將來襲。 - an amber alert
緊急失踪兒童警報
例句：An amber alert was issued for the missing child.
失踪兒童發出了緊急失踪兒童警報。 - set up a price alert
設定價格通知(警報)
例句：I set up a price alert for the item I want to buy when it goes on sale.
當我想買的商品降價時，我設定了一個價格警報。
例句：
- A weather alert was issued for heavy rain and possible flooding.
因大雨和可能的洪水而發布了天氣警報。 - The city is on high alert due to the increased risk of flooding.
由於洪水風險增加，這座城市處於高度警戒狀態。 - The hospital issued a medical alert due to an outbreak of a contagious disease.
醫院因傳染病爆發而發出醫療警報。 - The government issued a travel alert for citizens visiting certain countries with high crime rates.
政府為前往犯罪率較高國家的公民發布了旅行警報。 - The restaurant posted an allergy alert for customers with food allergies.
餐廳為有食物過敏的顧客張貼了過敏警報。 - The bank sent a fraud alert to customers regarding potential phishing scams.
銀行向客戶發出詐騙警報，提醒他們注意可能的網路釣魚詐騙。
同義詞：
- warning 警告、提醒 n. 告知別人危險或問題，使其注意。
例句：The weather forecast issued a warning for heavy rain.
氣象預報發出了大雨警告。 - caution 謹慎、警告 n. 提醒某人注意風險或危險，並採取謹慎行動。
例句：The teacher gave the students a caution about the dangers of using social media.
老師提醒學生注意使用社交媒體的危險性。 - notice 通知、告示 n. 提供有關某事的正式或非正式信息。
例句：The company posted a notice about the upcoming holiday schedule.
該公司發布了有關即將到來的假期日程安排表的通知。 - alarm 警報、驚恐 n. 用於提醒人們注意危險或緊急情況的設備或信號。
例句：The fire alarm went off when it detected smoke in the building.
建築物內檢測到煙霧時，火警響起。 - signal 信號、暗示 n. 表示某事物存在或即將發生的標誌或象徵。
例句：A sudden drop in temperature is a signal that winter is approaching.
氣溫的突然下降是冬天即將來臨的信號。
及物動詞：使警覺、向…發出警報
常見搭配詞：
- alert somebody to something
提醒某人注意
例句：The smoke detector alerted us to the fire.
煙霧探測器向我們我們發出火災警報。 - alert someone about something
提醒某人注意
例句：She alerted her coworker about the changes in the project timeline.
她提醒同事注意專案時間表的變化。 - alert authorities / the police / the media
通知當局 / 警方 / 媒體
例句：If you see any suspicious activity, alert the authorities immediately.
如果你看到任何可疑活動，立即通知當局。 - alert the public
警告公眾
例句：The government should alert the public about the potential health risks.
政府應該警告公眾注意潛在的健康風險。 - alert someone in advance
提前通知某人
例句：Please alert me in advance if you need to reschedule our meeting.
如果需要重新安排我們的會議，請提前通知我。
例句：
- She alerted the police when she noticed the intruder.
當她注意到入侵者時，她通知了警方。 - The company alerted the media about their new product launch.
公司通知媒體他們的新產品發布。 - He alerted security when he saw someone trying to break into the building.
他看到有人試圖闖入大樓時，通知了保全人員。 - The city alerted residents about the upcoming road closures.
市政府通知居民道路即將封閉。 - If you encounter any problems, alert your supervisor right away.
如果遇到任何問題，立即通知你的主管。
同義詞：
- notify 通知、告知 vt. 向某人提供有關某事的消息。
例句：Please notify me when the package arrives.
當包裹到達時，請通知我。 - inform 告知、通知 vt. 向某人提供有關某事的資訊或細節。
例句：The doctor informed the patient of the test results.
醫生將檢查結果告知病人。 - warn 警告、提醒 vt. 告訴某人可能發生危險或問題的事情，使其注意。
例句：She warned him about the possible consequences of his actions.
她提醒他注意他行為可能帶來的後果。 - advise 勸告、告知 vt. 向某人提供意見或建議，通常基於專業知識或經驗。
例句：The lawyer advised his client on the best course of action.
律師就最佳行動方案向客戶提供建議。 - signal 發信號、示意 vt. 通過手勢、聲音或其他方法向某人發出信息。
例句：He signaled the waiter to bring the bill.
他示意侍者把帳單送來。
衍生字：
- alertness 警覺、機警 n.
