joyfulness of [noun]
The joyfulness of the children was contagious.
孩子们的欢喜是有感染力的。
欢喜；高兴；快乐
快乐；喜悦
the emotion of great happiness
快乐；喜悦
The state of being joyful.
Her joyfulness filled the whole room as she shared the good news.
她分享好消息时，她的欢喜充满了整个房间。
用法提示：joyfulness 为不可数名词，在此表示‘欢喜、快乐’的情绪。
The joyfulness of the festival brought smiles to everyone's faces.
节日的欢乐让每个人脸上都露出了笑容。
用法提示：joyfulness 在此作主语，指‘欢乐’的氛围或情绪。
We could feel the joyfulness in the air during the celebration.
庆祝活动中，我们能感受到空气中洋溢的快乐。
用法提示：joyfulness 作宾语，表示‘快乐’的感受，体现其名词用法。
The joyfulness of the children was contagious.
孩子们的欢喜是有感染力的。
The celebration was full of joyfulness.
庆祝活动充满了欢乐。
She accepted the gift with joyfulness.
她满心欢喜地接受了礼物。
grammar · medium
易错句子I felt a joyfulness when I saw her.
正确表达I felt joyfulness when I saw her.
“joyfulness”是不可数名词，不需要不定冠词“a”。
grammar · medium
易错句子The news filled me with joyfulness.
正确表达The news filled me with joy.
在表达“充满快乐”时，习惯用“joy”而不是“joyfulness”，后者在此搭配中不自然。
joyfulness 强调状态，joy 更常指具体情感或事物
joyfulness 侧重内心洋溢的喜悦，happiness 更通用，涵盖满足感
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