Islower
判断是否小写字母
🗣️ 情景例句
Very nice to meet you.
很乐意见到你。
Well, hello, stranger! Have you moved something?
你好，久违了！你是迁居了还是怎么样啦？
I can't remember.The man who I served was wearing a hat.
我记不起来了。我接待的那个人戴着一顶帽子。