unburned mixture的用法和樣例：
例句
- For firing of the mixture in the cylinder every time spark occurs, the air-fuel ratio must lie in a fairly narrow range.
為了在氣缸里每一時(shí)刻發(fā)生一次火花時(shí)混合氣的燃燒更理想，空一燃混合比必須限于相當狹窄的區域內。 - Blowby is basically the leakage of compressed air-fuel mixture and burned gases past the piston rings into the crankase.
竄氣，基本上是被壓縮的空燃混合氣和燃燒后的氣體的泄漏，它通過(guò)活塞環(huán)進(jìn)入曲軸箱。
