allow sb / sth to do sth:People aren’t allowed to eat food on the underground in Nanjing.在南京，地铁上禁止人们吃东西。
It can be used whether that was to sign a card to someone or to send a sweet text message. It's universally known as a message of love and affection， but have you ever wondered exactly what XOXO really means or where it even came from?众所周知，它是表达爱和情感的意思，但你有没有想过XOXO到底是什么意思，或者它是从哪里来的?
