cheer·ful·ness
noun/ˈtʃɪəflnəs/
/ˈtʃɪrflnəs/
[uncountable]- behaviour that shows you are happy, especially in a difficult situation
开朗：表现出您快乐的行为，尤其是在困难的情况下 - Everyone on the team demonstrated an unfailing cheerfulness that served us well.
团队中的每个人都表现出始终如一的快乐，这对我们很有帮助。
- Everyone on the team demonstrated an unfailing cheerfulness that served us well.