in a nut shell的用法和样例：
- The noise got on my nerves and I nearly ended up in a nut factory.
- He has a yen to be alone in a boat.
- The boat heeled over in a strong wind.
- In a frenzy of hate he killed his enemy.
- His strength in a crisis is an ace in the hole.
- She is a receptionist in a doctor's office.