happy  
adjective uk/ˈhæp.i/ us/ˈhæp.i/
  (PLEASED)      
 A1 幸福的,满意的,快乐的
feeling, showing, or causing pleasure or satisfaction
  a happy marriage/childhood 幸福的婚姻/童年 
 She looks so happy. 她看上去非常快乐。 
 School days are said to be the happiest days of your life. 学生时代据说是一生中最快乐的时光。 
 Nicky seems a lot happier since she met Steve. 尼基自从认识史蒂夫之后似乎快乐多了。 
 You'll be happy to know that Jean is coming with us. 要是知道琼和我们一起前来,你会很高兴的。 
 I'm perfectly happy to (= I will willingly) help out. 我非常愿意帮忙。 
 I'm so happy (that) everything is working out for you. 我很高兴你一切都很顺利。 
 Barry seems happy enough working for himself. 巴里似乎很乐意为自己工作。 
 Are you happy about/with (= satisfied with) your new working arrangements? 你对新的工作安排满意吗? 
 Your mother's not going to be very happy when she sees the mess you've made! 你妈妈看到你弄得乱七八糟,她是不会高兴的。 
formal The manager will be happy (= is willing) to see you this afternoon. 经理很乐意今天下午见你。 
 - More examples
 - Childhood is not always a happy time.
 - If there's anything you don't understand, I'll be happy to explain.
 - They had a long and happy marriage.
 - The staff are not very happy about the latest pay increase.
 - It was clear that he wasn't happy with the arrangements, so I tried to book a different hotel.
 
  (GREETING)      
 A1 [ before noun ](用于特殊日子的祝福)…快乐 
(used in greetings for special occasions) full of enjoyment and pleasure
  Happy Birthday! 生日快乐! 
 Happy Anniversary! 周年快乐! 
 Happy New Year! 新年快乐! 
 - More examples
 - We all clinked our glasses together and drank to a happy new year.
 - We wish you a long and happy retirement.
 - The card said 'Happy Anniversary' in big silver letters.
 - Happy Christmas, Mum - this is for you.
 - I didn't even see her to wish her a happy birthday.
 
  (LUCKY)      
  [ before noun ](情况)幸运的 
(of a condition or situation) lucky
  We hadn't planned to be in France at the same time as Ann and Charles - it was just a happy coincidence. 我们从未打算与安和查尔斯同时到法国——那只是一个幸运的巧合。 
   (SUITABLE)      
 literary(言语或行为)恰当的,得体的 
(of words or behaviour) suitable
  It wasn't a happy choice of phrase given the circumstances. 这样的措词不适合这种场合。 
 Idioms        
the happy dayidiom  humorous 婚礼
a marriage
  So when's the happy day then? 那么婚礼何时举行? 
 the happy eventidiom  humorous (US also the blessed event) 喜事(指孩子出生)
the birth of a child
 not be a happy camperidiom  informal humorous (UK also not be a happy bunny ) 烦恼的,愠怒的
to be annoyed about a situation
  Her computer crashed an hour ago and she's lost a morning's work - she's not a happy camper at the moment. 她的电脑一小时前崩溃了,害得她一早上的工作成果都没了。现在她正窝火着呢。