词汇：
1 joyful adj. 欢喜的 （程度较深）
e.g. The child's joyful laugh made us smile. 这小孩愉快的大笑让我们微笑。
I had a joyful reaction when I saw the engagement ring. 我看到订婚戒指的时候开心极了。
2 ecstatic [ɪk'stætɪk; ek-] adj. 欣喜若狂的 （程度深）
e.g. I was ecstatic to enjoy her gig. 我看她演唱会的时候真的欣喜若狂。
Sharon will be ecstatic if all of her students can score 8.5 in IELTS speaking. 虾仁一定会欣喜若狂的，如果她的学生们都能考到8.5的话。
3 elated [ɪ'leɪtɪd] adj. 兴高采烈的，得意洋洋的（程度深，还带一点自豪）
e.g. The man was elated when he saw his son's performance. 这个人看到自己孩子的表演兴高采烈的。
He was elated after winning the contest. 赢得比赛后他得意洋洋的。
4 glad adj.开心的 （程度较浅，还没怎么表现在脸上）
e.g. I‘m glad you came to the party. 我很开心你来到我的聚会上。
I’ll be glad to introduce my friend. 我很开心地介绍一下我的朋友。
5 upbeat adj. 乐观的（带积极意义的开心）
e.g. The song was really upbeat and put us in a good mood. 这首歌积极向上的，让我们心情很好。
Even though the flight got cancelled, she remains upbeat about the situation. 尽管航班取消了，她还是很乐观。
6 lively adj. 活跃的 （带一点能量的开心）
e.g. The small gathering of people turned into a lively party. 这个小型聚会变成了一个有活力的派对。
We had a lively discussion about the mouth-watering food in the room. 关于房间里令人垂涎欲滴的美食，我们进行了热烈的讨论。
7 chipper adj.爽朗的，愉快的（和lively 很像，但氛围更加轻松一些）
e.g. He's in a chipper mood because he has a date tonight. 他心情好毕竟晚上有约会。
The dog seems very chipper. He won't stop playing. 这狗狗似乎很愉快呀，都没有停止玩耍。
8 thrilled (极度兴奋的那种)
e.g. I was thrilled when I got the offer from University of Cambridge. 当我收到剑桥大学录取的时候，我极度兴奋。
He was thrilled to go skydiving for the first time. 他第一次跳伞的时候开心极了。
9 cheerful adj. 愉快的,愉悦的，高兴的 （能表现在脸上那种开心）
e.g. My mother is always happy. She's such a cheerful person. 我妈妈总是很开心，她是一个脸上洋溢着开心的人。
The cheeful couple is looking at the camera. 这对愉快的夫妇正看着相机。
10 blissful ['blɪsfʊl; -f(ə)l] adj. 充满喜悦的（很纯粹的，无忧无虑的那种开心，而且是非常开心）
e.g. Everyone loves the blissful feeling of going to sleep. 每个人都喜欢睡觉的那种幸福，纯粹而充满喜悦。
We spent a blissful evening at the beach. 我在海滩度过了一个无忧无虑且令我愉快的一个傍晚。
11 euphoric [juː'fɒrɪk] adj. 狂喜的 (极度开心那种，好像能穿透全身每一个细胞)
e.g. The dog felt euphoric as he ran into the water. 当这只狗狗跳进水里的时候，它狂喜不已。
I watched an amazing sunrise and I felt euphoric. 我看到了超棒的日出，并且狂喜不已。
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