specific impulse的用法和樣例：
例句
- Curves of constant specific impulse are traced inside the triangle.
比沖為常數的曲線則畫在三角形內部。 - 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.
特別值得一提的是，甲烷的比衝量較高，這個燃料效率值代表特定重量的推進燃料所能產生的動量。
