1. His joviality is contagious and always brightens up the room.
他的愉快常常是具有感染力的，总是让房间充满了明亮的氛围。
2. Despite her bad day, she tried to maintain a sense of joviality.
尽管她有一个糟糕的一天，但她努力保持愉快的气氛。