Valvetrain
气门
🗣️ 情景例句
What do you call this? A tow year old child could have done a better job!
你是怎么回事？就连两岁的孩子都可以比这做得更好！
This is a check.
这是一张支票。
Last Tuesday he received a letter from the local police.
上星期二他收到当地警察局的一封信，