单词：once for all
只此一次, 一劳永逸地, 彻底地
once for all的用法和样例：
例句
- Thoroughly clean the entire house,often done only once a year.彻底地打扫房屋，经常是每年一次。
- Tomorrow we shall have finished with this business once for all.明天我们就能一劳永逸地把这事结束掉了。
- She had hoped to get rid of the girl for good and all.她原想一劳永逸地把这个姑娘赶走。