It's noting.When the don't say holle,say when you leave,please?是什么?

It's noting.When the don't say holle,say when you leave,please?是什么?
It's noting.When the don't say holle,say when you leave,please?是什么?

It's noting.When the don't say holle,say when you leave,please?是什么?
It's noting.When they don't say hello,you just say bye-bye when you leave.
-------无所谓的.如果他们不同你打招呼,你就对他们说再见 / 你就离开他们.