You are both welcome sir为什么要用both?

You are both welcome sir为什么要用both? You are welcome You are welcome! You are welcome是什么意思? You are welcome. You are welcome! you are most welcome you are welcome是什么意思? you are most welcome you are welcome beby you are welcome中的welcome是什么意思 you are always welcome 急 You are welcome的中文 You are always welcome lar. You are welcome中文是 怎么翻译You are welcome are you welcome 连成句 You are welcome怎么回