It is OK to ask children how old they are.
问小孩多大了是可以的。
疯狂英语精华演讲卡 敏感的话题（一）

📚 句中词汇解析

从本句中提取的重要词汇

children ['tʃɪldrən] 词频1
n. 孩子们(child的复数);儿童;膝下;孥;
"Children must learn socially acceptable behaviour."
儿童必须学会社会上认可的行为举止。
近义：kids, bambini, bambinos, offspring, progeny, scions 反义：parentage

📚 更多「疯狂英语精华演讲卡」例句

Unless in uniform, he doesn't look like a policeman.
除非穿上制服，要不他看起来不像警察。
It's nice to be sitting here with you.
在这里陪你坐着是非常愉快的。[动词不定式的进行时]
You can't count on the weather being fine.
你不能指望天晴。
He has interviewed a lot of people for the job.
他已和许多应征这份工作的人面谈过了。
This cannot compare with that.
这个无法与那个相比。
But Li Ming has promised to come home for the summer vacations.
但是李明已经答应暑假回家。