A crack-up due to overwork的用法和样例：
- His illness was due to overwork.
- The cell phone blew up due to overheating.
- Cyril is going to crack up If he doesn't stop working so hard.
- Can loosen up due to corrosion and cause substantial leakage.
- His illness is attributable to overwork.
- Steam puffed up from a crack in the metal.