Toupper
小写字母转换成大小字母
🗣️ 情景例句
Earth day should be every day.
每一天都应该是地球日。
Thank you! Same to you.
谢谢。你也一样。
The other model's more expensive, but it's worth the money.
那种型号价格是贵一些，但它值得那么多钱。