Fire-fighters have to be on-call all the time because they never know when a fire is going to happen.
If there're any problems in your apartment, the manager is on-call and can help you.
2. sweat 担心
There are a lot of things to worry about in life. Try not to sweat the small things.
3. silver spoon 银勺子，财富
I haven't been fed with a silver spoon all my life; my family didn't have a lot of money when I was a child.
She was born with a silver spoon in her mouth. She has never had to work for anything in her life.
泰坦尼克号经典台词（双语