Toupper
小写字母转换成大小字母
🗣️ 情景例句
We would adopt payment by instalments for our present practice,
这次交易我们将采取分期付款方式，
Speech is silver (or silvern), silence is golden.
雄辩是银，沈默是金。
I won't charge you this time.But you'd better not do it again!
这次我就不罚你款了。但你最好不要再开得这样快。