名詞 cheerfulness:

1. the quality of being cheerful and dispelling gloom
   同義詞：cheer, sunniness, sunshine
2. a feeling of spontaneous good spirits
   同義詞：blitheness

1. Her efforts to feign cheerfulness weren't convincing.
   她的強顏歡笑并不使人信服。
2. I have tried in my time to be a philosopher; but I don't know how, cheerfulness was always breaking in.
   在我的一生中，我曾經努力想成為一個哲學家; 可是，不知道怎么的，高興的情緒老是闖了進來。
3. Showing or characterized by cheerfulness and lighthearted excitement; merry.
   快樂的，愉快的表現出歡樂的、愉快的激動的，或具有其特征的; 高興的
4. His cheerfulness is false.
   他的快活是虛假的。
5. Our friends have a look of cheerfulness.
   我們的朋友看上去很高興。