cheerfulness
n. 高兴；快活
例句
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。”
The true source of cheerfulness is benevolence.
快乐的真正源泉是行善。
To be friendly you must feel friendly. Cheerfulness is the basis of friendliness.
要友善，你一定要给人友好的感觉：快乐是友善的基础。
