喜不自禁 unable to contain one's joy
Explanation
形容抑制不住内心的喜悦，非常高兴。
Describes uncontainable joy and great happiness.
Origin Story
小明期盼已久的比赛终于开始了。他站在起跑线上，心跳加速，紧张又兴奋。发令枪响，他像离弦的箭一样冲了出去，一路领先。到达终点时，他远远超过了其他选手，获得了冠军！小明激动地跳了起来，喜不自禁地挥舞着双手，眼泪夺眶而出。他紧紧地抱着教练，感谢教练的悉心指导。领奖台上，他接过奖杯，看着闪闪发光的奖牌，心里充满了自豪和喜悦。这是他多年努力的成果，也是他梦想实现的时刻。这一刻，他所有的付出都得到了回报，喜悦的心情难以言表。
Xiaoming's long-awaited competition finally began. Standing at the starting line, his heart pounded with excitement and nervousness. The starting gun fired, and he dashed off like an arrow, leading the race from start to finish. He reached the finish line far ahead of the other competitors, winning the championship! Xiaoming jumped with joy, waving his hands uncontrollably, tears streaming down his face. He hugged his coach tightly, thanking him for his careful guidance. On the podium, he received the trophy, looking at the gleaming medal, his heart filled with pride and joy. This was the result of years of hard work, the moment when his dream came true. At this moment, all his efforts were rewarded, and his joy was indescribable.
Usage
作谓语、宾语、状语；表示非常高兴。
As a predicate, object, or adverbial; expresses great joy.
Examples
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听到这个好消息，他喜不自禁地跳了起来。
tīng dào zhège hǎo xiāoxi, tā xǐ bù zì jīn de tiào le qǐlái.
Hearing the good news, he jumped up for joy.
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考试取得好成绩，她喜不自禁地笑了。
kǎoshì qǔdé hǎo chéngjī, tā xǐ bù zì jīn de xiàole.
She smiled happily at her good test scores.
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获得一等奖，他喜不自禁地拥抱了家人。
huòdé yīděng jiǎng, tā xǐ bù zì jīn de yōng bào le jiārén。
He happily hugged his family after winning first prize.