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"
双语例句
用作形容词 (adj.)
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。
