Valvetrain
气门
🗣️ 情景例句
So tell me about your educational history.
请告诉我你的教育经历。
Work hard, otherwise you'll be sorry.
努力用功，否则你会后悔的。
The officers got out and the prisoner stood to attention and saluted as they passed.
军官们下了车，战俘立正站好，并在他们从他面前经过时敬了礼。