Curves of constant specific impulse are traced inside the triangle. 比冲为常数的曲线则画在三角形内部。
In particular, the fuel exhibits a higher specific impulse, a measure of fuel efficiency that describes how much momentum a given weight of propellant can impart. 特别值得一提的是，甲烷的比冲量较高，这个燃料效率值代表特定重量的推进燃料所能产生的动量。
