Dohc
abbr. 雙頂置凸輪軸（Double Overhead Camshaft）
??? 情景例句
It's Malcolm Stewart!
他是Malcolm Stewart。
No matter what he does, don't show you mind.
不管他做什么，你總不要表現你介意。
Everything's very quiet.I'm sure there's no one at home.
毫無動靜，肯定家里沒有人。