Toupper
小写字母转换成大小字母
🗣️ 情景例句
He grew up happily in a small village.
他在小村庄里快乐地长大。
All roads lead to Rome.
条条道路通罗马。
We were very much surprised when the snake charmer suddenly began to play jazz and modern pop songs.
当耍蛇人突然又吹奏起爵士乐和现代流行乐曲时，我们感到非常惊奇。