Toupper
小写字母转换成大小字母
🗣️ 情景例句
That's a pretty good salary.
那待遇很好。
By doing nothing we learn to do ill.
懒散学为非。
We need to find one about 30 centimetres(cm) by 30 cm by 50 cm.
我们需要找一只尺寸大约为30（厘米）X 30（厘米）X 50（厘米）的水箱。