Toupper
小写字母转换成大小字母
🗣️ 情景例句
When you have a business meeting in the United States, come to the appointment on time.
当你在美国有商务会晤时，一定要按时赴约。
I can show you other quotations that are lower than yours.
我可以把比贵公司报价低得多的价目表给你看看。
The cooker is blue.
电灶的颜色是蓝的。