Dohc
abbr. 双顶置凸轮轴（Double Overhead Camshaft）
🗣️ 情景例句
He owes his wealth to diligence and good luck.
他的财富是由于他的勤劳和幸运。
Reason is the guide and light of life.
理智是人生的响导和光辉。
What will be the population of these countries by the end of the twentieth century?
到20世界末较发达国家的人口将是多少？