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刻發生一次火花時混合氣的燃燒更理想，空一燃混合比必須限於相當狹窄的區域內。 - 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，它通過活塞環進入曲軸箱。
