s marked by up-to-dateness in dress and manners
s having a cheerful, lively, and self-confident air
a. 快活的, 活泼的, 轻快的
1. She walked into the room with a jaunty smile.
她带着活泼的微笑走进了房间。
2. The jaunty music made everyone want to dance.
轻快的音乐让每个人都想跳舞。
3. He wore a jaunty hat that caught everyone's attention.
他戴着一顶引人注目的帽子，吸引了所有人的注意。