not breathe a syllable的用法和樣例：
例句
- There is no room to put in a single additional word.
再一個字也加不進來了。 - He promises me to keep it a strict secret.
他答應我對此事絕對保密。 - Participation will not require an NDA.
參與公開測試不需要簽署保密協議。 - The movie star is a clam about her age.
這影星對她的年齡守口如瓶。 - I do not mean to pry,so there's no need to clam up on me.
我並不想要探聽什麼，因此你不必對我守口如瓶。
