"切换DNS检查"是什么?是allow好还是not allow好?

not allow 允许某人做某事:是allow Sb.to do还是allow Sb.do还是allow Sb.doing? allow是啥意思? payment_no is not allow null 翻译not be allow to do It is not allow smoking here people.(not allow) to enter the room 英语语法 Please allow me to introduce myself for you 检查 Father will not allow us to play on the street.哪个是宾语补足语 allow ,permit的用法分别是什么? permit与allow用法区别是什么? allow的中文意思是什么啊