USAGE NOTE 用法说明: happy, content, glad, and 和 ecstatic
There are several different words to describe being happy. Someone who is content is feeling happy because they are satisfied. 有好几个不同的单词可以表示“高兴”、“满意”（happy）这个意思。content 表示“满足的”:
They're content to lead a simple life. 他们满足于过简单的生活。
Someone who is glad is pleased about something that has happened. glad 表示对已发生的事感到高兴:
I'm so glad you were able to come. 你能来我真高兴。
If someone is very excited as well as happy they are ecstatic. ecstatic 表示“狂喜的”:
An ecstatic crowd cheered as the players ran onto the field. 球员跑进场时狂喜的人群欢呼起来。