A One-time-off Implementation within Script的用法和样例：
- A quantity of explosive to be set off at one time.
- Look let's not make a big deal out of this! It was a one time thing. It doesn't even matter!
- My younger sister was at one time a boarder.
- It was my freshman year of college!--a one time thing,I never talked her again,so it was kind of the best and worst.