combustible mixture的用法和样例：
例句
- The idle system supplies a very rich mixture to start with.
怠速系统提供很浓的可燃混合气供起动使用。 - For this reason, it is necessary to provide extremely rich mixture from the carburetor in order to provide sufficient combustible mixture to all cylinders for quick starting.
由于这个原因，要使发动机迅速启动，必须通过化油器向每个汽缸提供浓的可燃混合气。
