known best的用法和樣例：
例句
- I warned her to check the date her application form should he in, but she always know best. Well, she's cooked her goose now, because by this time next year she'll be too old to qualify for a grant.
我提醒過她檢查一下交申請表的日期，可她總以為自己最懂。好了，現在她完了，因為明年這時候她的歲數超過了，沒資格申請補助金了。 - Leave the cure to Mother Nature. She knows best.
要想痊癒就聽其自然吧.
