happier , happiest
Someone who is happy has feelings of pleasure, usually because something nice has happened or because they feel satisfied with their life.
Marina was a confident, happy child.
玛丽娜是个自信、快乐的孩子。
A happy time, place, or relationship is full of happy feelings and pleasant experiences, or has an atmosphere in which people feel happy.
Except for her illnesses, she had a particularly happy childhood.
除去病痛不提,她有个特别快乐的童年。
It had always been a happy place.
此地一直以来都是处开心地。
If you are happy about a situation or arrangement, you are satisfied with it, for example, because you think that something is being done in the right way.
If you are not happy about a repair, go back and complain.
如果你对维修不满意,就回去投诉。
He's happy that I deal with it myself.
我自己解决了问题,他对此很满意。
If you say you are happy to do something, you mean that you are very willing to do it.
I'll be happy to answer questions if there are any.
如果有什么问题的话,我将很乐意回答。
Happy is used in greetings and other conventional expressions to say that you hope someone will enjoy a special occasion.
Happy birthday!
生日快乐!