介绍:
Dear passengers，
The train to xxxx is arriving.
For your safety, please wait behind the yellow line and mind the gap between the train and the platform.
Thank you for your cooperation!
passengers：乘客
safety：安全，安全性
I'm worried about his safety.
我们担心他的安全。
They crossed the street in safety.
他们安全的过了马路。
behind:在...后面
Don't forget to close the door behind you.
别忘了关上你后面的门。
mind:介意，当心
Mind your head.
小心碰头。
Would you mind waiting outside for a moment?
你介意在外面等一会儿吗?
gap:沟，缝隙
generation gap：代沟
There is a generation gap between my parents and I.
我和我的父母之间有代沟！
platform: 讲台，站台
After the class，Eleven jumped from the platform.
下课之后，11从讲台上跳了下来。
platform nine and 3 quarters
九又四分之三站台
大家还在听
