所以，这种我们认为与嬉闹欢快的含义相关联的动作，以词源学分析，会从“精神亢奋”一直追溯到表示“跳，蹦”的一个词源上。
Thus the activity and motion that we might associate with frolicking points right back through the meaning of “high spirits” to a leaping source for the etymology.
爵士乐让聆听者时而忧伤，时而欢快，时而平静，时而精神焕发。
Jazz can make the listener feel sad or joyful, quiet or full of energy.
然后，她带上画板，吹着轻松欢快的口哨，装作精神抖擞的样子跨进了琼珊的房间。
Then she swaggered into Johnsy 's room with her drawing board, whistling ragtime.
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