hello every one 啥意思?

hello every one 啥意思? 一个英语语法问题是hello,everyone 还是 hello,every one?为什么不用 hello，every one？ 是hello everyone还是hello every one ,有什么区别 every one 甚么意思? 问好时应该说i：“Hello,everyone!”还是“Hello,every one!有什么区别?（书面作文） Hello是啥意思? hello啥意思 hello啥意思 hello是啥意思? hello啥意思? hi?hello?啥意思 hello意思 hello意思 HELLO是啥意思?无聊 HELLO EVERY ONE请问：硅酸钠,碳酸钠,钛白粉,它们会和烧碱发生反应吗?THANK YOU hello意思 every one 英文HELLO KITTY 中文 啥意思, Hello,every one!How do you think about the colour green?Do you like it I need your help .