Toupper
小写字母转换成大小字母
🗣️ 情景例句
By all means, you ahead.
当然可以。随便。
The used key is always bright.
常用的钥匙总是光亮的。
I have to transfer to No. ll bus, but where is the bus stop?
我需要换乘11路公共汽车，但是汽车站在哪儿？