Adjective:
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
蒋争熟词记忆openadj.张开的；睁开的eyen.眼-ed…的⇒睁着眼睛的；留神的；惊讶的openadj.张开的；睁开的eyen.眼-ed…的⇒睁着眼睛的；留神的；惊讶的近义词 vigilant警戒的wakeful人醒着的
形容词100%
用作形容词Their wedding was an open secret.他们的婚礼是公开的秘密。
All of his dealings are in the open.他的一切交易往来都是公开的。
She is a very friendly,open person.她是一位很友好很坦率的人。
I am sure you will give me a plain and open answer.我相信你一定会给我一个简单，坦率的答复。