sunniness 

英汉解释

n. 阳光照射，阳光充足；活泼

同义词

n. cheer，cheerfulness，sunshine

反义词

n.   uncheerfulness

参考例句

1. I have a sunniness of disposition, and think a lot of professional dedication in working time.
个性开朗，爱好广泛，个人认为工作上敬业精神最为重要。
2. I have a sunniness of disposition, and think a lot of professional dedication in working time. Maybe I'll become a excellent Architect in the future, this is my beautiful dream .
个性开朗，爱好广泛，个人认为工作上敬业精神最为重要。理想是成为一名优秀的建筑师，圆好大学时代梦想。

英英解释

n.
  1. lightness created by sunlight
  2. the quality of being cheerful and dispelling gloom

网络释义

sunniness
阳光照射; 晴朗;
sunniness sunshiny
向阳极好的;