Definition: the state of being happy or bright and pleasant to look at Level: C2
他的快乐让我们都感觉更好。
His ___cheerfulness made us all feel better.
明亮的颜色常常与快乐联系在一起。
Bright colors are often linked to ___cheerfulness.
她持续的快乐具有感染力。
Her constant ___cheerfulness was infectious.
