under the hood片語KK [ˋʌndɚ ðə hʊd] /ˈʌndɚ ðə hʊd/發音片語1內部運作、底層、幕後口語The app looks the same, but a lot has changed under the hood.這個應用程式看起來沒變,但底層改動很多。2引擎蓋下、引擎部分美式He opened the car and poked around under the hood for ten minutes.他打開車子,在引擎蓋下摸索了十分鐘。形容詞1內部的、底層的This release is mostly under-the-hood improvements to speed and security.這個版本主要是速度和安全性方面的底層改進。