observant

形容词 observant:

1. paying close attention especially to details
2. quick to notice; showing quick and keen perception
   同义词：observing
3. (of individuals) adhering strictly to laws and rules and customs
   同义词：law-abiding

1. An observant shop assistant had remembered exactly what the man was worn.
   有个机警的店员准确记得那个男子的穿著。
2. An observant shop assistant had remembered exactly what the man was wearing.
   有个机警的店员准确记得那个男子的穿著。
3. Journalists are trained to be observant.
   新闻记者都要训练成有敏锐观察力的人。

ob.ser.vant

adj.（形容词）
Quick to perceive or apprehend; alert:
敏感的，敏锐的：迅速感觉的或理解的；敏感的：
例句：
an observant traveler.See Synonyms at careful
一个感觉敏锐的旅行者参见 careful

Diligent in observing a law, custom, duty, or principle:
遵从的：不倦于遵守法律、习俗、责任或规则：
例句：
observant of the speed limit.
遵守速度限制

【引伸】
obser.vantly
adv.（副词）