Precombustion
预燃, 在前置燃烧室内燃烧
🗣️ 情景例句
Keep your nose to the grindstone; you'll succeed.
埋头苦干，总有成功的一天。
He is eating a lot.
他吃了很多。
No. She's wearing green trousers, and a yellow sweater.
不。她穿绿色裤子，黄色毛衣。