Islower
判断是否小写字母
🗣️ 情景例句
If you feel tired at work, Just take a vacation.
如果你觉得工作太累了，不防去度假。
Do you have an opinion?
你有意见吗？
Why can't you do something about it? Can you change it?
干吗你不想点办法呢？你能换掉它吗？