vivacity
n. 活泼，快活，精神充沛；活泼（或轻快）的行为（或表情、情景等）（vivacities）
复数 vivacities
例句
He was charmed by her beauty and vivacity.
他被她的美丽与活泼迷住了。
《牛津词典》
She said to a girl almost at Tom's elbow--with sham vivacity, "Why, Mary Austin!"
她故作轻松地，对在汤姆手肘旁边的一个姑娘说：“哟，玛丽·奥斯汀！”
The old woman remained silent, and Heidi, with the greatest vivacity, began to describe her life with the grandfather.
老奶奶保持沉默，小海蒂用欢快的语调开始描述她和爷爷的生活。
