a.lert
alert的音标和读音：
DJ音标发音： [əˈlə:t]
KK音标发音： [əˈlɜt]
alert的词性：
adj.（形容词）
1. Vigilantly attentive; watchful:
警觉的，警惕的；注意的：
alert to danger; an alert bank guard.See Synonyms at aware
警惕危险；警觉的银行保安人员参见 aware
2. Mentally responsive and perceptive; quick.
思维敏捷的：思维反应迅速且感觉灵敏的；快速敏捷的
3. Brisk or lively in action:
活泼的：行动轻快或有活力的：
the bird's alert hopping from branch to branch.
小鸟在树枝间欢快地跳跃
alert的词性：
n.（名词）
4. A signal that warns of attack or danger:
警报：警告进攻或危险的信号：
Sirens sounded the alert for an air raid.See Synonyms at alarm
空袭警报的警笛响起参见 alarm
5. A condition or period of heightened watchfulness or preparation for action:
警戒状态：高度警惕或准备随时行动的状态或阶段：
Nuclear-armed bombers were put on alert during the crisis.
核武装轰炸机在危机期间负责警戒
alert的词性：
v.tr.（及物动词）
6. To notify of approaching danger or action; warn:
向…报警：对临近的危险或行动发出通知；警告：
a flashing red light that alerted motorists to trouble ahead.
闪烁的红灯警告摩托车手前面有危险
7. Watchful and prepared for danger, emergency, or opportunity:
警戒着，防备着：注意着且防备着危险、意外或机会：
bird watchers on the alert for a rare species.
看守者人密切注意稀有鸟类
alert的词源：
8. French alerte
法语 alerte
9. from Italian all' erta [on the lookout]
源自 意大利语 all' erta [密切注意]
10. alla [to the, on the] from Latin ad illam [to that] ad- [ad-] illam [accusative of] illa [that] * see al- 1
alla [对…，在…之上] 源自 拉丁语 ad illam [对那个] ad- [前缀，表“朝向”] illam [] illa的宾格 [那] *参见 al- 1
11. erta [lookout] [from past participle of] ergere [to raise] from Latin ?rigere * see erect
erta [注意] [] 源自ergere的过去分词 [举起] 源自 拉丁语 ?rigere *参见 erect