Greetings in Passing
It is polite to greet a person you know. However, you don't always have time to stop and have a conversation. Just remember to smile as you say hello. A small wave is also polite. Sometimes you pass the same person a second time on the same day. You can say "hello again" or just smile.
这一小段英语演讲稿好像太短了，麻烦帮我头尾都添加几句吧!
Greetings in Passing
It is polite to greet a person you know. However, you don't always have time to stop and have a conversation. At this moment, the only thing you can do is smiling . Remembering to smile when you say hello. A small wave is also polite. Sometimes you pass the same person a second time on the same day. You can say "hello again" or just smile. The interpersonal communication is very frequent in our life.It is important to greet with each other politely.