1.Their cheerfulness seemed rather strained and artificial.
他们快乐表情看上很勉强而做作。
2.She knew that her efforts to feign cheerfulness weren’t convincing.
她明白自己强作欢颜是瞒不了谁。
3.Cheerfulness doesn’t always imply happiness.
快活并不总是意味着幸福。
4.Then Bhisma, the valiant grandsire of the Kuru dynasty roaring like a lion, blew his conch shell very loudly for increasing Duryodhana's cheerfulness.