It's the stoichiometric fuel ratio. 14.7 parts air to one part fuel for gasoline.

这是化学计量燃料比。 14. 7 份空气对 1 份汽油燃料。

But in a lab, or in life, you have to work with measurable amounts of stuff, so the last stoichiometric trick you need up your sleeve is to calculate specific masses of the reactants and products.

但在实验室或生活中，您必须处理可测量数量的物质，因此您需要袖手旁观的最后一个化学计量技巧是计算反应物和产物的比重。