Adjective:
having very keen vision;quick-sighted as a cat
carefully observant or attentive; on the lookout for possible danger;a policy of open-eyed awareness
the vigilant eye of the town watch
there was a watchful dignity in the room
a watchful parent with a toddler in tow
近义词 vigilant警戒的open-eyed留神的wakeful人醒着的lynx-eyed眼光锐利的hawk-eyed目光锐利的quick-sighted眼快的sharp-eyed目光敏锐的keen-sighted目光敏锐的sharp-sighted眼光锐利的