open adj.开着的；开放的；公开的v.打开；张开；展开；摊开；开始(某事物)；开张；营业；以…开头；宣布启用n.户外；公开
双语例句
The police were asked to keep an eye open for the little boy who had got lost in the square. 警方奉命密切注意在广场走失的小男孩子(的方向)。
Keep a weather eye open for any small faults with your car- if they're not repaired immediately they could cost you a lot of money later. 汽车无论出什么小毛病，你都要留心——如果不立即修理，说不定哪一天会使你花去许多钱的。
All the doors were laid open for his departure, not without the privity of the King. 所有的门都为他的离开而开启，而国王对此事并非一无所知。
The school has only been open for six months, so it's too early to evaluate its success. 这所学校开办还不过六个月，所以要对它的成绩作出评价为时尚早。
