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1·He said, with a great show of cheerfulness: I bet there's been pirates on this island before, boys.

他露出充满兴趣的样子说：“伙计们，我敢说这个岛上以前一定有过海盗。”

2·Cheerfulness is health.

欢乐就是健康。

3·Cheerfulness is the basis of friendliness.

令人愉快是友谊的基础。

4·Cheerfulness and goodwill make Labour light.

欢快与好意，劳动不觉累。

5·Cheerfulness is a property of her personality.

开朗乐观是她的性格特征。

6·The true source of cheerfulness is benevolence.

快乐的真正源泉是行善。

7·Show cheerfulness even when you don't feel it.

即使没有感觉到也要表现出自己的愉快心情。

8·Perhaps my cheerfulness rests on a slender hope.

也许我的快乐是建筑在渺茫的希望之上的。

9·That which befits us is cheerfulness and courage.

愉快心情和勇气才是适合我们的。

10·Her voice was modulated to a ghostly cheerfulness.

她的声音是愉快的，但做作得可怕。