1. go for lunch 吃午餐
例句：
They're asking if they can go for lunch.
他们问他们是不是可以去吃中饭了。
2. have no idea 不知道
相当于don't know。
例句：
You have no idea if the well-paid job in a bank is as boring as you imagine.
你不清楚一个收入不错的银行工作是否像你想象得那么无聊。
3. have no appetite 没胃口
例句：
I have no appetite and always on the edge.
吃饭也没有胃口，总是感紧不安。
4. know of 了解，认识
know of了解的程度没有know深，就像hear of“听说”听的没有hear多一样。
例句：
I know of a young man in new york city who forgot his girlfriend's birthday.
我认识一个住在纽约的年轻男人，他忘记了女朋友的生日。
5. improve appetite 开胃
例句：
Less greasy food should light, both to meet the nutritional needs, but also improve appetite.
饮食宜清淡少油腻，既满足营养的需要，又能增进食欲。
6.（sb） hope so 希望如此
例句：
You hope so? You're not sure?
你也希望是这样？你不能确定？
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