Bibo
有界输入有界输出（bounded-input bounded-output）
🗣️ 情景例句
Where will you be living during your stay here?
你在此期间打算住哪里？
You'll get hurt, if you don't watch out.
你不注意的话，就会受伤。
Opportunity knocks but once.
机不可失，时不再来。