The intense, irresistible mutual attraction or sexual passion between lovers.

他们久别重逢，如烈火干柴一般，瞬间点燃了旧日的爱火。

A situation where an intense fire meets dry wood, resulting in a rapid and uncontrollable conflagration.

在这极其干燥的季节，森林里一点火星就能引发烈火干柴般的火灾。